Chemical Formula Quick Problem?
Q. Alright the question is List the numbers and types of atoms represented by these chemical formulas: Fe2O3, KMnO4, CH3, and NH4NO3 thanks guys
Asked by Jack - Tue Dec 9 21:14:19 2008 - - 1 Answers - 0 Comments
Q. Alright the question is List the numbers and types of atoms represented by these chemical formulas: Fe2O3, KMnO4, CH3, and NH4NO3 thanks guys
Asked by Jack - Tue Dec 9 21:14:19 2008 - - 1 Answers - 0 Comments
Which set of chemical name and chemical formula for the same compound is correct?
Q. 1. iron(11) oxide, Fe2O3 2. aluminum fluorate, AIF3 3.tin(IV) bromide, SnBr4 4. pottassium chloride, K2Cl2
Asked by tipmdavis216 - Mon Dec 10 20:42:56 2007 - - 1 Answers - 0 Comments
A. 3 is correct
Answered by BRK - Mon Dec 10 20:47:52 2007
Q. 1. iron(11) oxide, Fe2O3 2. aluminum fluorate, AIF3 3.tin(IV) bromide, SnBr4 4. pottassium chloride, K2Cl2
Asked by tipmdavis216 - Mon Dec 10 20:42:56 2007 - - 1 Answers - 0 Comments
A. 3 is correct
Answered by BRK - Mon Dec 10 20:47:52 2007
Given the chemical formulas of the following compounds, name each compound and state. 10 points love?
Q. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. KI Fe2O3
Asked by Suck it - Wed Nov 19 10:55:52 2008 - - 4 Answers - 0 Comments
A. KI Potassium iodide Compounds with a positive ion (cation), the name of the compound is simply the cation's name (usually the same as the element's), followed by the anion (negative ion), using "-ide". Fe2O3 Iron(III) oxide The oxidation number of the METAL ion (in this case iron) has a Roman numeral in parentheses immediately following the metal ion (iron) name. See, when you switch the numbers, iron has a charge of +3 and oxygen has a charge of -2. The metal (iron) has the Roman numeral!
Answered by Be Positive!!! - Wed Nov 19 16:16:10 2008
Q. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. KI Fe2O3
Asked by Suck it - Wed Nov 19 10:55:52 2008 - - 4 Answers - 0 Comments
A. KI Potassium iodide Compounds with a positive ion (cation), the name of the compound is simply the cation's name (usually the same as the element's), followed by the anion (negative ion), using "-ide". Fe2O3 Iron(III) oxide The oxidation number of the METAL ion (in this case iron) has a Roman numeral in parentheses immediately following the metal ion (iron) name. See, when you switch the numbers, iron has a charge of +3 and oxygen has a charge of -2. The metal (iron) has the Roman numeral!
Answered by Be Positive!!! - Wed Nov 19 16:16:10 2008
Balance out this chemical formula?
Q. How do you balance this equation? I tried to do it with algebra but I was unsuccessful. Tips on balancing equations? Fe2Cr2O4 + K2CO3 + O2 >>> K2CrO4 + Fe2O3 + CO2
Asked by Rock n' Roll - Sun Jul 19 23:31:14 2009 - - 2 Answers - 0 Comments
A. 2Fe2Cr2O4 + 4K2CO3 + 5O2 >>> 4K2CrO4 + 2Fe2O3 + 4CO2 the best and easiest way to do it is to make a list of all your components and the number of them there are. make a separate list for each side. then make the numbers match. initial list (reactant side / product side) Fe--2 / 2 Cr--2 / 1 O--9 / 9 K--2 / 2 C--1 / 1 example of the process cr--2 (X2) = 4 that's the way you'd mark each thing when you change the coefficient. remember that if you change one number, you have to multiply everything connected to it. in this case, K and O. just keep multiplying until it all works.
Answered by setsunaluvr - Sun Jul 19 23:56:54 2009
Q. How do you balance this equation? I tried to do it with algebra but I was unsuccessful. Tips on balancing equations? Fe2Cr2O4 + K2CO3 + O2 >>> K2CrO4 + Fe2O3 + CO2
Asked by Rock n' Roll - Sun Jul 19 23:31:14 2009 - - 2 Answers - 0 Comments
A. 2Fe2Cr2O4 + 4K2CO3 + 5O2 >>> 4K2CrO4 + 2Fe2O3 + 4CO2 the best and easiest way to do it is to make a list of all your components and the number of them there are. make a separate list for each side. then make the numbers match. initial list (reactant side / product side) Fe--2 / 2 Cr--2 / 1 O--9 / 9 K--2 / 2 C--1 / 1 example of the process cr--2 (X2) = 4 that's the way you'd mark each thing when you change the coefficient. remember that if you change one number, you have to multiply everything connected to it. in this case, K and O. just keep multiplying until it all works.
Answered by setsunaluvr - Sun Jul 19 23:56:54 2009
General chemical nomenclature question?
Q. Which of the following 15 chemical names for Fe2O3 are: BEST, WORST, GOOD, BAD, right or wrong, and why? ## Chemical Name Formula 01 Diiron oxide Fe2O3 02 Diiron sesquioxide Fe2O3 03 Diiron trioxide Fe2O3 04 Diiron(III) oxide Fe2O3 05 Diiron(III) sesquioxide Fe2O3 06 Diiron(III) trioxide Fe2O3 07 Ferric oxide Fe2O3 08 Ferric sesquioxide Fe2O3 09 Ferric trioxide Fe2O3 10 Iron oxide Fe2O3 11 Iron sesquioxide Fe2O3 12 Iron trioxide Fe2O3 13 Iron(III) oxide Fe2O3 14 Iron(III) sesquioxide Fe2O3 15 Iron(III) trioxide Fe2O3 Thank you, I appreciate all your comments.
Asked by jimschem - Sat Oct 13 18:59:58 2007 - - 1 Answers - 0 Comments
A. its no 13 for the correct one. i think 15 is the worst.
Answered by neoga illinois - Sat Oct 13 19:11:52 2007
Q. Which of the following 15 chemical names for Fe2O3 are: BEST, WORST, GOOD, BAD, right or wrong, and why? ## Chemical Name Formula 01 Diiron oxide Fe2O3 02 Diiron sesquioxide Fe2O3 03 Diiron trioxide Fe2O3 04 Diiron(III) oxide Fe2O3 05 Diiron(III) sesquioxide Fe2O3 06 Diiron(III) trioxide Fe2O3 07 Ferric oxide Fe2O3 08 Ferric sesquioxide Fe2O3 09 Ferric trioxide Fe2O3 10 Iron oxide Fe2O3 11 Iron sesquioxide Fe2O3 12 Iron trioxide Fe2O3 13 Iron(III) oxide Fe2O3 14 Iron(III) sesquioxide Fe2O3 15 Iron(III) trioxide Fe2O3 Thank you, I appreciate all your comments.
Asked by jimschem - Sat Oct 13 18:59:58 2007 - - 1 Answers - 0 Comments
A. its no 13 for the correct one. i think 15 is the worst.
Answered by neoga illinois - Sat Oct 13 19:11:52 2007
What do you think of the systematic approach I've developed to finding chemical formulas?
Q. A systematic approach to finding chemical formulas. "Find the formula for Iron (III) Oxide" 1. Write down the two elements next to each other, putting the cation first: FeO 2. Take the charge of the cation and write it after the anion. (If the charge is 1, it doesn't have to be written.) FeO3 3. Now find the net charge of the anion. O has a charge of -2. Multiplied by 3 gives it a net charge of -6. 4. Write the correct subscript next to the cation so that it's net charge is equal and opposite to that of the anion, resulting in a compound that has a net charge of 0. Fe has a net charge of 3+, because it's called Iron(III). To get +6, it needs to be multiplied by 2. Fe2O3
Asked by CrO4^2- - Sat Oct 18 13:56:04 2008 - - 1 Answers - 0 Comments
Q. A systematic approach to finding chemical formulas. "Find the formula for Iron (III) Oxide" 1. Write down the two elements next to each other, putting the cation first: FeO 2. Take the charge of the cation and write it after the anion. (If the charge is 1, it doesn't have to be written.) FeO3 3. Now find the net charge of the anion. O has a charge of -2. Multiplied by 3 gives it a net charge of -6. 4. Write the correct subscript next to the cation so that it's net charge is equal and opposite to that of the anion, resulting in a compound that has a net charge of 0. Fe has a net charge of 3+, because it's called Iron(III). To get +6, it needs to be multiplied by 2. Fe2O3
Asked by CrO4^2- - Sat Oct 18 13:56:04 2008 - - 1 Answers - 0 Comments
What is the total number of electrons shared between the atoms represented in this formula?
Q. (1) 1 (3) 8 (2) 2 (4) 4 Which statement describes what occurs as two atoms of bromine combine to become a molecule of bromine? (1) Energy is absorbed as a bond is formed. (2) Energy is absorbed as a bond is broken. (3) Energy is released as a bond is formed. (4) Energy is released as a bond is broken. 9 What is the chemical formula for iron (III) oxide? (1) FeO (3) Fe3O (2) Fe2O3 (4) Fe3O2 10 An atom of which element has the greatest attraction for the electrons in a bond with a hydrogen atom? (1) Chlorine (3) silicon (2) Phosphorus (4) sulfur 11 Which property could be used to identify a compound in the laboratory? (1) Mass (3) temperature (2) Melting point (4) volume 7 Which element is a metal that is in the liquid phase at… [cont.]
Asked by Help P - Thu Oct 9 06:43:00 2008 - - 1 Answers - 0 Comments
A. 3 2 1 2 4 1
Answered by Lordcoup - Thu Oct 9 07:41:50 2008
Q. (1) 1 (3) 8 (2) 2 (4) 4 Which statement describes what occurs as two atoms of bromine combine to become a molecule of bromine? (1) Energy is absorbed as a bond is formed. (2) Energy is absorbed as a bond is broken. (3) Energy is released as a bond is formed. (4) Energy is released as a bond is broken. 9 What is the chemical formula for iron (III) oxide? (1) FeO (3) Fe3O (2) Fe2O3 (4) Fe3O2 10 An atom of which element has the greatest attraction for the electrons in a bond with a hydrogen atom? (1) Chlorine (3) silicon (2) Phosphorus (4) sulfur 11 Which property could be used to identify a compound in the laboratory? (1) Mass (3) temperature (2) Melting point (4) volume 7 Which element is a metal that is in the liquid phase at… [cont.]
Asked by Help P - Thu Oct 9 06:43:00 2008 - - 1 Answers - 0 Comments
A. 3 2 1 2 4 1
Answered by Lordcoup - Thu Oct 9 07:41:50 2008
chemistry help please!!!!!!!!!! due today!!!?
Q. -The Chemical formula Al2O3 ; O2; Al -The chemical equation : Fe2O3 Fe + O2 - Balancing the chemical equation oFe2O3 Fe + O2 Need 6 oxygens on both sides (LCD of 3 and 2) o2Fe2O3 Fe + 3O2 Need 4 irons on each side o2Fe2O3 4Fe + 3O2 (This is now a balanced equation) -Stoichiometry ratios of the coefficients in the balanced equation; For example the ratios in the balanced equation 2Fe2O3 4Fe + 3O2 are: 1 Fe2O3 : 2 Fe 2 Fe2O3 : 3 O2 If 30g of Fe2O3 would be used how many grams of O2 would be produced? Set up the problem: 30g Fe2O3 = mass of Fe2O3 30g Fe2O3 x (1mol Fe2O3/ 156.69g Fe2O3) = moles of iron oxide 30g Fe2O3 x (1mol Fe2O3/ 156.69g Fe2O3) x (3 moles O2/ 2 moles Fe2O3) = moles of O2 30g Fe2O3 x (1mol Fe2O3/… [cont.]
Asked by KIKI - Wed Sep 23 15:26:04 2009 - - 2 Answers - 0 Comments
A. 1000g Fe2O3 * 1 mol Fe2O3/156.69 g * (4 moles Fe/2Moles Fe2O3) *55.85g/ 1 mole Fe = 712.87 g of Fe will be produced.
Answered by unknown - Wed Sep 23 15:37:24 2009
Q. -The Chemical formula Al2O3 ; O2; Al -The chemical equation : Fe2O3 Fe + O2 - Balancing the chemical equation oFe2O3 Fe + O2 Need 6 oxygens on both sides (LCD of 3 and 2) o2Fe2O3 Fe + 3O2 Need 4 irons on each side o2Fe2O3 4Fe + 3O2 (This is now a balanced equation) -Stoichiometry ratios of the coefficients in the balanced equation; For example the ratios in the balanced equation 2Fe2O3 4Fe + 3O2 are: 1 Fe2O3 : 2 Fe 2 Fe2O3 : 3 O2 If 30g of Fe2O3 would be used how many grams of O2 would be produced? Set up the problem: 30g Fe2O3 = mass of Fe2O3 30g Fe2O3 x (1mol Fe2O3/ 156.69g Fe2O3) = moles of iron oxide 30g Fe2O3 x (1mol Fe2O3/ 156.69g Fe2O3) x (3 moles O2/ 2 moles Fe2O3) = moles of O2 30g Fe2O3 x (1mol Fe2O3/… [cont.]
Asked by KIKI - Wed Sep 23 15:26:04 2009 - - 2 Answers - 0 Comments
A. 1000g Fe2O3 * 1 mol Fe2O3/156.69 g * (4 moles Fe/2Moles Fe2O3) *55.85g/ 1 mole Fe = 712.87 g of Fe will be produced.
Answered by unknown - Wed Sep 23 15:37:24 2009
A couple of questions about the compound rust...?
Q. Okay so I know Rust's chemical name is Iron Oxide, and I think its chemical formula is something like Fe2O3. (could someone correct me if I'm wrong?) I also need to know about its bonding structure (can you show me a diagram if possible?), the atomic structure and the uses for rust, if there are any? Please help! Thanks!
Asked by ... - Fri Jul 25 23:34:38 2008 - - 1 Answers - 0 Comments
A. Rust is Fe2O3. A good depiction of the structure is given at the reference.
Answered by Otts Shoals - Sat Jul 26 20:57:26 2008
Q. Okay so I know Rust's chemical name is Iron Oxide, and I think its chemical formula is something like Fe2O3. (could someone correct me if I'm wrong?) I also need to know about its bonding structure (can you show me a diagram if possible?), the atomic structure and the uses for rust, if there are any? Please help! Thanks!
Asked by ... - Fri Jul 25 23:34:38 2008 - - 1 Answers - 0 Comments
A. Rust is Fe2O3. A good depiction of the structure is given at the reference.
Answered by Otts Shoals - Sat Jul 26 20:57:26 2008
How do you find the number of atoms in chemical formulas?
Q. These are the problems: 1. NaCl 2.H2SO4 3. KNO3 4. CaCl2 5. C2H6 6. Ba(OH)2 7. NH4Br 8. Ca3(PO4)2 9. Al2(SO4)3 10. Mg(NO3)2 11. Cu(NO3)2 12. KMnO4 13. H2O2 14. H3PO4 15. (NH4)3PO4 16. Fe2O3 17. NaC2H3O2 18. Mg(C2H3)2O2 19. Hg2Cl2 20. K2SO3 I need to know how and maybe the answers to a few of those questions, or all of them. Thanks!
Asked by Alex - Mon Oct 13 23:21:54 2008 - - 1 Answers - 0 Comments
A. what ever the number is beside the element is the number of atoms in the formula. ex. #13 has 2 hydrogen and 2 oxygen
Answered by bennjo18 - Mon Oct 13 23:28:40 2008
Q. These are the problems: 1. NaCl 2.H2SO4 3. KNO3 4. CaCl2 5. C2H6 6. Ba(OH)2 7. NH4Br 8. Ca3(PO4)2 9. Al2(SO4)3 10. Mg(NO3)2 11. Cu(NO3)2 12. KMnO4 13. H2O2 14. H3PO4 15. (NH4)3PO4 16. Fe2O3 17. NaC2H3O2 18. Mg(C2H3)2O2 19. Hg2Cl2 20. K2SO3 I need to know how and maybe the answers to a few of those questions, or all of them. Thanks!
Asked by Alex - Mon Oct 13 23:21:54 2008 - - 1 Answers - 0 Comments
A. what ever the number is beside the element is the number of atoms in the formula. ex. #13 has 2 hydrogen and 2 oxygen
Answered by bennjo18 - Mon Oct 13 23:28:40 2008
Everyone Please Help Me Answer All The Questions !?
Q. Title: Metals 1. Which property do most metals have? A. Do not conduct electricity. B. Do not conduct heat. C. High melting point. D. Low density. 2. From the list given below, identify a metal that does not react with hydrochloric acid. A. Potassium B. Magnesium C. Zinc D. Copper 3. The apparatus shown is used to heat a metal oxide with carbon. Which metal oxide reacts to produce a metal? A. Calcium oxide B. Copper(II) oxide C. Magnesium oxide D. Sodium oxide 4. An iron nail is coated with paint. What does the paint keep away from the nail to prevent rusting? A. Oxygen and water B. Oxygen only C. Water only D. Acid 5. Which substance reacts… [cont.]
Asked by !x!AnimeBoy!x! - Sat Apr 11 11:01:29 2009 - - 1 Answers - 0 Comments
A. 4. only oxygen (im sure that's what my teacher told me) i think is this a science test from england where you have 4 options for each answer??
Answered by unknown - Sat Apr 11 11:11:27 2009
Q. Title: Metals 1. Which property do most metals have? A. Do not conduct electricity. B. Do not conduct heat. C. High melting point. D. Low density. 2. From the list given below, identify a metal that does not react with hydrochloric acid. A. Potassium B. Magnesium C. Zinc D. Copper 3. The apparatus shown is used to heat a metal oxide with carbon. Which metal oxide reacts to produce a metal? A. Calcium oxide B. Copper(II) oxide C. Magnesium oxide D. Sodium oxide 4. An iron nail is coated with paint. What does the paint keep away from the nail to prevent rusting? A. Oxygen and water B. Oxygen only C. Water only D. Acid 5. Which substance reacts… [cont.]
Asked by !x!AnimeBoy!x! - Sat Apr 11 11:01:29 2009 - - 1 Answers - 0 Comments
A. 4. only oxygen (im sure that's what my teacher told me) i think is this a science test from england where you have 4 options for each answer??
Answered by unknown - Sat Apr 11 11:11:27 2009
chemistry help? =] please? final tomorrow =[?
Q. 36) In a Lewis dot diagram, the dots represent ___ in the atom. 37) All of the following elements are metals except ___. 38) ___ is credited with discovering the periodic law. 39) The second period of the periodic table includes ___. 40) ___ is an unreactive element. 41) Which of the following is a transition element? 42) All group 1 elements have ___. 43) Earliest attempts at classifying elements were based on ___. 44) The blank spaces in Mendeleev s periodic table represented ___. 45) Modern periodic law states that properties of elements repeat in a regular pattern when the elements are arranged in order of increasing ___. 46) Horizontal rows on the periodic table are known as ___. 47) Columns on the periodic table are known as ___. 48)… [cont.]
Asked by alyssa - Tue Jun 9 22:57:33 2009 - - 1 Answers - 0 Comments
A. There are a few I am unsure, so I'll draw a line for those ones. 36 valence electrons. 37 those found to the right of the stair-steps (right side of table starting from boron and goes to Po and At) 38 Mendeleev 39 metals, name elements from #3 - 10 40 Any element in Group 18 (noble gases) 41 Any element in Groups 3 - 12 42 1 electron in valence shell 43 atomic masses 44 elements not yet discovered 45 atomic # 46 periods 47 groups 48 properties 49 solids 50 metals 51 brittle, gaseous 52 3 - 12 53 nitrogen 54 different from 55 valence electrons 56 do not react under normal conditions 57 8 58 oxygen, 6 59 ionic 60 2 61 ionic 62 covalent 63 bond 64 sharing of electrons 65 3 66 unreactive 67 cation 68 negative ; anion 69 ionizes; metallic 70… [cont.]
Answered by unknown - Tue Jun 9 23:28:58 2009
Q. 36) In a Lewis dot diagram, the dots represent ___ in the atom. 37) All of the following elements are metals except ___. 38) ___ is credited with discovering the periodic law. 39) The second period of the periodic table includes ___. 40) ___ is an unreactive element. 41) Which of the following is a transition element? 42) All group 1 elements have ___. 43) Earliest attempts at classifying elements were based on ___. 44) The blank spaces in Mendeleev s periodic table represented ___. 45) Modern periodic law states that properties of elements repeat in a regular pattern when the elements are arranged in order of increasing ___. 46) Horizontal rows on the periodic table are known as ___. 47) Columns on the periodic table are known as ___. 48)… [cont.]
Asked by alyssa - Tue Jun 9 22:57:33 2009 - - 1 Answers - 0 Comments
A. There are a few I am unsure, so I'll draw a line for those ones. 36 valence electrons. 37 those found to the right of the stair-steps (right side of table starting from boron and goes to Po and At) 38 Mendeleev 39 metals, name elements from #3 - 10 40 Any element in Group 18 (noble gases) 41 Any element in Groups 3 - 12 42 1 electron in valence shell 43 atomic masses 44 elements not yet discovered 45 atomic # 46 periods 47 groups 48 properties 49 solids 50 metals 51 brittle, gaseous 52 3 - 12 53 nitrogen 54 different from 55 valence electrons 56 do not react under normal conditions 57 8 58 oxygen, 6 59 ionic 60 2 61 ionic 62 covalent 63 bond 64 sharing of electrons 65 3 66 unreactive 67 cation 68 negative ; anion 69 ionizes; metallic 70… [cont.]
Answered by unknown - Tue Jun 9 23:28:58 2009
Chemistry Chemical Equations?
Q. 1. Write word equations for the following chemical reactions a)Pure copper can be produced by hearing copper(II) sulfide in the presence of diatomic oxygen from the air. Sulfur dioxide gas is also produced in this reaction b)Water is formed by the explosive reaction between hydrogen gas and oxygen gas. c)When baking soda (sodium hydrogen carbonate is heated, it decomposes, forming the products sodium carbonate, carbon dioxide, and water. 2. Balance the equations. a) SO2+O2---> SO3 b)Fe2O3+H2---> Fe+H2O c)P+O2--->P4O10 d)Al+N2--->A1N 3.Write formulas and other symbols for these substances a)sulfur trioxide gas b)potassium nitrate dissolved in water c)heat supplied to a chemical reaction d)metallic copper e)liquid mercury f)zinc… [cont.]
Asked by 123 - Tue Jan 6 23:47:02 2009 - - 1 Answers - 0 Comments
A. 2. (and 4) Balancing an equation means having the equal amounts of each element on each side. You can't create or destroy elements in a simple chemical reaction. All these equations have to be balanced because one of the reactants is a dimer gas molecule. To be balanced, the coefficients in front of each reactant and product has to be integral. In #1, as written, there is too much "O' on the left. If we double the amount of SO3 on the right, We have twice as much S on the right, so we can double the amount on the left. Now we have both S and O in balance. Thus, 2 SO2 + O2 -> 2 SO3. In #2, we need to double the Fe on the right, as each unit of Fe2O3 provides 2 Fe. However, the O is still unbalanced. So we triple the H2O to… [cont.]
Answered by cattbarf - Wed Jan 7 00:09:36 2009
Q. 1. Write word equations for the following chemical reactions a)Pure copper can be produced by hearing copper(II) sulfide in the presence of diatomic oxygen from the air. Sulfur dioxide gas is also produced in this reaction b)Water is formed by the explosive reaction between hydrogen gas and oxygen gas. c)When baking soda (sodium hydrogen carbonate is heated, it decomposes, forming the products sodium carbonate, carbon dioxide, and water. 2. Balance the equations. a) SO2+O2---> SO3 b)Fe2O3+H2---> Fe+H2O c)P+O2--->P4O10 d)Al+N2--->A1N 3.Write formulas and other symbols for these substances a)sulfur trioxide gas b)potassium nitrate dissolved in water c)heat supplied to a chemical reaction d)metallic copper e)liquid mercury f)zinc… [cont.]
Asked by 123 - Tue Jan 6 23:47:02 2009 - - 1 Answers - 0 Comments
A. 2. (and 4) Balancing an equation means having the equal amounts of each element on each side. You can't create or destroy elements in a simple chemical reaction. All these equations have to be balanced because one of the reactants is a dimer gas molecule. To be balanced, the coefficients in front of each reactant and product has to be integral. In #1, as written, there is too much "O' on the left. If we double the amount of SO3 on the right, We have twice as much S on the right, so we can double the amount on the left. Now we have both S and O in balance. Thus, 2 SO2 + O2 -> 2 SO3. In #2, we need to double the Fe on the right, as each unit of Fe2O3 provides 2 Fe. However, the O is still unbalanced. So we triple the H2O to… [cont.]
Answered by cattbarf - Wed Jan 7 00:09:36 2009
Please help: lewis structures, balancing chemical equations, VSEPR theory.?
Q. I need help with these problems on my chemistry review! I know it's alot, but please do whatever u can the best u can. I typed all of the numbers regular size for ex. O2. They are supposed to be smaller and lower, (idk what u call it I was thinkin exponents but exponents are in the upper right hand corner but anyway u know what I mean). Please bare with me! Especially on the lewis structures. Draw Lewis Structures for each of the following molecules: O2 N2 CO SO2 Draw a Lewis structure for each of the following, and then use VSEPR theory to predict the molecular geometry of each: SCl2 PI3 CL2O NH2CL SiCl3Br ONCl Write formulas for each of the following compounds: Potassium Hydroxide Calcium Nitrate Sodium Carbonate Carbon… [cont.]
Asked by Reesie - Tue Apr 21 22:07:34 2009 - - 1 Answers - 0 Comments
A. Visit these sites to learn more about chemistry formulas and concepts that can help you in regards to your problem:
Answered by Dhan Noon - Sat Apr 25 20:33:29 2009
Q. I need help with these problems on my chemistry review! I know it's alot, but please do whatever u can the best u can. I typed all of the numbers regular size for ex. O2. They are supposed to be smaller and lower, (idk what u call it I was thinkin exponents but exponents are in the upper right hand corner but anyway u know what I mean). Please bare with me! Especially on the lewis structures. Draw Lewis Structures for each of the following molecules: O2 N2 CO SO2 Draw a Lewis structure for each of the following, and then use VSEPR theory to predict the molecular geometry of each: SCl2 PI3 CL2O NH2CL SiCl3Br ONCl Write formulas for each of the following compounds: Potassium Hydroxide Calcium Nitrate Sodium Carbonate Carbon… [cont.]
Asked by Reesie - Tue Apr 21 22:07:34 2009 - - 1 Answers - 0 Comments
A. Visit these sites to learn more about chemistry formulas and concepts that can help you in regards to your problem:
Answered by Dhan Noon - Sat Apr 25 20:33:29 2009
chemistry help?
Q. what are the names of these compounds using the stock system (b) CrF2 (c) Fe(OH)2 (d) MgO (e) Fe2O3 (f) AgNO3 (g) LiBr (h) FePO4 (i) Sn(NO3)2 Write the chemical formula for the following compounds. (a) strontium bromide (b) potassium hydride (c) vanadium(V) oxide (d) aluminum fluoride
Asked by jason t - Mon Dec 10 21:59:04 2007 - - 2 Answers - 0 Comments
A. (b) CrF2 = chromium(II) difluoride (c) Fe(OH)2 = ferrous hydroxide / iron (II) hydroxide (compounds containing Fe^2+ are called ferrous compounds, the ones with Fe^3+ are called Ferric compounds) (d) MgO = magnesium oxide (e) Fe2O3 = ferric oxide / iron (III) oxide (f) AgNO3 = silver nitrate (g) LiBr = lithium bromide (h) FePO4 = iron (III) phosphate (i) Sn(NO3)2 = tin nitrate (a) strontium bromide = SrBr2 (strontium = Sr^2+ ; bromide = Br^-) (b) potassium hydride = KH (potassium = K^+ ; hydride = H^-) (c) vanadium(V) oxide = V2O5. (vanadium (V) = V^5+ ; oxide = O^2-) (d) aluminum fluoride= AlF3 (alumnium = Al^3+ ; fluoride = F^-) Hope this helps:D
Answered by kodie - Mon Dec 10 22:15:44 2007
Q. what are the names of these compounds using the stock system (b) CrF2 (c) Fe(OH)2 (d) MgO (e) Fe2O3 (f) AgNO3 (g) LiBr (h) FePO4 (i) Sn(NO3)2 Write the chemical formula for the following compounds. (a) strontium bromide (b) potassium hydride (c) vanadium(V) oxide (d) aluminum fluoride
Asked by jason t - Mon Dec 10 21:59:04 2007 - - 2 Answers - 0 Comments
A. (b) CrF2 = chromium(II) difluoride (c) Fe(OH)2 = ferrous hydroxide / iron (II) hydroxide (compounds containing Fe^2+ are called ferrous compounds, the ones with Fe^3+ are called Ferric compounds) (d) MgO = magnesium oxide (e) Fe2O3 = ferric oxide / iron (III) oxide (f) AgNO3 = silver nitrate (g) LiBr = lithium bromide (h) FePO4 = iron (III) phosphate (i) Sn(NO3)2 = tin nitrate (a) strontium bromide = SrBr2 (strontium = Sr^2+ ; bromide = Br^-) (b) potassium hydride = KH (potassium = K^+ ; hydride = H^-) (c) vanadium(V) oxide = V2O5. (vanadium (V) = V^5+ ; oxide = O^2-) (d) aluminum fluoride= AlF3 (alumnium = Al^3+ ; fluoride = F^-) Hope this helps:D
Answered by kodie - Mon Dec 10 22:15:44 2007
Science Help Please!!!?
Q. 1. How cam you tell if an element is a non metal or a metal? 2. How can you tell what enerhy level and subshell the valence e- are in? 3. How is the periodic table organized? 4. What happens to the electrons in an ionic bond? 5. What happens to the electrons in a covalent bond? 6. What is a chemical formula made of? 7. What happens to atoms during a chemical reaction? 8. What is the law of conservation of mass? 9. What is the law of conservation of energy? 10. What is the molecular weight of 3 Fe2O3? 11. What is the molecular weight of 2 CO2? 12. Defintion's of Newtons 1st, 2nd, and 3rd laws Solve: A school bus can accelerate from a complete stop at 1.3m/s(with a little 2 at the top of the "s"). How long will it take the bus… [cont.]
Asked by Irish - Thu Jun 5 17:32:28 2008 - - 1 Answers - 0 Comments
A. go to google or ask.com
Answered by Country Girl - Thu Jun 5 18:26:31 2008
Q. 1. How cam you tell if an element is a non metal or a metal? 2. How can you tell what enerhy level and subshell the valence e- are in? 3. How is the periodic table organized? 4. What happens to the electrons in an ionic bond? 5. What happens to the electrons in a covalent bond? 6. What is a chemical formula made of? 7. What happens to atoms during a chemical reaction? 8. What is the law of conservation of mass? 9. What is the law of conservation of energy? 10. What is the molecular weight of 3 Fe2O3? 11. What is the molecular weight of 2 CO2? 12. Defintion's of Newtons 1st, 2nd, and 3rd laws Solve: A school bus can accelerate from a complete stop at 1.3m/s(with a little 2 at the top of the "s"). How long will it take the bus… [cont.]
Asked by Irish - Thu Jun 5 17:32:28 2008 - - 1 Answers - 0 Comments
A. go to google or ask.com
Answered by Country Girl - Thu Jun 5 18:26:31 2008
Questions on Rechargeable Batteries and Water...Help?!?!?
Q. In rechargeble batteries, what is regenerated? a)electrons b)electricity c)the salts which fill the bridge d)the reactants which underwent chem. changes during the original operations of the battery. 2)The following equation for the formation of rust is incorrect: 4 Fe + 3 O2--> 2 Fe2O3 a)The equation is unbalanced b) in the equation, oxygen should be a catalyst, not a participant c)water should be a reactant, and the formula for rust is incomplete. d)nothing is wrong- the equation is correct 3)The water produced by a water treatment plant a)is pure water with nothing dissolved in it b)is impure water with many substances dissolved in it. c) has undergone chemical change and is technically no longer water at all. d) is not potable. … [cont.]
Asked by unknown - Sat Aug 25 16:36:54 2007 - - 3 Answers - 0 Comments
A. 1.c 2. d 3. the answer depends on whether you mean a waste water treatment plant or a fresh water treatment plant. Waste water is not potable. Fresh water is. Fresh water would have chloride and fluoride in it also as well as dissolved minerals 4. metallic bonds are formed as metals share electrons and electrons are free to roam within te metal. luster, conductivity of heat and electricity, malleability, ductility 5. ions can carry a current
Answered by science teacher - Sat Aug 25 16:48:33 2007
Q. In rechargeble batteries, what is regenerated? a)electrons b)electricity c)the salts which fill the bridge d)the reactants which underwent chem. changes during the original operations of the battery. 2)The following equation for the formation of rust is incorrect: 4 Fe + 3 O2--> 2 Fe2O3 a)The equation is unbalanced b) in the equation, oxygen should be a catalyst, not a participant c)water should be a reactant, and the formula for rust is incomplete. d)nothing is wrong- the equation is correct 3)The water produced by a water treatment plant a)is pure water with nothing dissolved in it b)is impure water with many substances dissolved in it. c) has undergone chemical change and is technically no longer water at all. d) is not potable. … [cont.]
Asked by unknown - Sat Aug 25 16:36:54 2007 - - 3 Answers - 0 Comments
A. 1.c 2. d 3. the answer depends on whether you mean a waste water treatment plant or a fresh water treatment plant. Waste water is not potable. Fresh water is. Fresh water would have chloride and fluoride in it also as well as dissolved minerals 4. metallic bonds are formed as metals share electrons and electrons are free to roam within te metal. luster, conductivity of heat and electricity, malleability, ductility 5. ions can carry a current
Answered by science teacher - Sat Aug 25 16:48:33 2007
I have a few chemistry problems that I need help solving for an assignment and better understanding.?
Q. A sample of a substance (containing only C, H, and N) is burned in oxygen. 7.629 g of CO2, 1.115 g of H2O and 1.486 g of NO are the sole products of combustion. What is the empirical formula of the compound? What was the mass of the initial sample burned? A natural product has the molecular formula C23H25O7. What is the molar mass of this compound (in g/mol)? 413.4 g/mol How many carbon atoms are in 2.75 pg of this compound? A 5.32-g geological sample, containing the mineral Boulangerite (Pb5Sb4S11) as the only lead-bearing compound, is subjected to chemical treatment in which the lead is quantitatively recovered as solid PbCl2. The mass of PbCl2 obtained is 2.76 g. What was the percentage (by mass) of Pb5Sb4S11 in the sample? A… [cont.]
Asked by Karly-Jo K - Sun Oct 18 14:46:06 2009 - - 2 Answers - 0 Comments
A. here's the solution to the first one ... mass of CO2 given in the question :7.6290g: so the moles of CO2 is :0.1734moles: / formula mass of CO2 (44) and the moles of carbon :0.1734moles: same as the moles of C in the CO2 mass of water given in the question :1.1150g giving moles of water as :0.0619moles: / formula mass of H2O (18) and moles of H =0.1239moles: X 2 the moles of H in the H2O the mass of NO given in the question is :1.4860g moles of NO is calculated to be :0.0495moles: / atomic weight of N and the moles of N are : 0.0495moles: same as the moles of N in the NO summary of moles C0.1734 H0.1239 N0.0495 divide by smallest to get the ratio C3.5004 H2.5011 N1.000 multiply by 2 to get whole numbers C7.0008 H5.0022 N2.000… [cont.]
Answered by unknown - Mon Oct 19 08:09:55 2009
Q. A sample of a substance (containing only C, H, and N) is burned in oxygen. 7.629 g of CO2, 1.115 g of H2O and 1.486 g of NO are the sole products of combustion. What is the empirical formula of the compound? What was the mass of the initial sample burned? A natural product has the molecular formula C23H25O7. What is the molar mass of this compound (in g/mol)? 413.4 g/mol How many carbon atoms are in 2.75 pg of this compound? A 5.32-g geological sample, containing the mineral Boulangerite (Pb5Sb4S11) as the only lead-bearing compound, is subjected to chemical treatment in which the lead is quantitatively recovered as solid PbCl2. The mass of PbCl2 obtained is 2.76 g. What was the percentage (by mass) of Pb5Sb4S11 in the sample? A… [cont.]
Asked by Karly-Jo K - Sun Oct 18 14:46:06 2009 - - 2 Answers - 0 Comments
A. here's the solution to the first one ... mass of CO2 given in the question :7.6290g: so the moles of CO2 is :0.1734moles: / formula mass of CO2 (44) and the moles of carbon :0.1734moles: same as the moles of C in the CO2 mass of water given in the question :1.1150g giving moles of water as :0.0619moles: / formula mass of H2O (18) and moles of H =0.1239moles: X 2 the moles of H in the H2O the mass of NO given in the question is :1.4860g moles of NO is calculated to be :0.0495moles: / atomic weight of N and the moles of N are : 0.0495moles: same as the moles of N in the NO summary of moles C0.1734 H0.1239 N0.0495 divide by smallest to get the ratio C3.5004 H2.5011 N1.000 multiply by 2 to get whole numbers C7.0008 H5.0022 N2.000… [cont.]
Answered by unknown - Mon Oct 19 08:09:55 2009
Everyone Please Help Me Answer All The Questions !?
Q. Title: Metals 1. Which property do most metals have? A. Do not conduct electricity. B. Do not conduct heat. C. High melting point. D. Low density. 2. From the list given below, identify a metal that does not react with hydrochloric acid. A. Potassium B. Magnesium C. Zinc D. Copper 3. The apparatus shown is used to heat a metal oxide with carbon. Which metal oxide reacts to produce a metal? A. Calcium oxide B. Copper(II) oxide C. Magnesium oxide D. Sodium oxide 4. An iron nail is coated with paint. What does the paint keep away from the nail to prevent rusting? A. Oxygen and water B. Oxygen only C. Water only D. Acid 5. Which substance reacts… [cont.]
Asked by !x!AnimeBoy!x! - Sat Apr 11 11:01:17 2009 - - 1 Answers - 0 Comments
Q. Title: Metals 1. Which property do most metals have? A. Do not conduct electricity. B. Do not conduct heat. C. High melting point. D. Low density. 2. From the list given below, identify a metal that does not react with hydrochloric acid. A. Potassium B. Magnesium C. Zinc D. Copper 3. The apparatus shown is used to heat a metal oxide with carbon. Which metal oxide reacts to produce a metal? A. Calcium oxide B. Copper(II) oxide C. Magnesium oxide D. Sodium oxide 4. An iron nail is coated with paint. What does the paint keep away from the nail to prevent rusting? A. Oxygen and water B. Oxygen only C. Water only D. Acid 5. Which substance reacts… [cont.]
Asked by !x!AnimeBoy!x! - Sat Apr 11 11:01:17 2009 - - 1 Answers - 0 Comments
Name The Compounds? 10 Points?
Q. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. KI Fe2O3 (NH4)3PO4
Asked by I am What I Am - Wed Dec 3 14:00:32 2008 - - 1 Answers - 0 Comments
A. KI -- potassium iodine Fe2O3 --- Its Iron (III) oxide. This is because the valencies have to interchange. O (Oxygen) becomes O3 because the Fe (Iron) valency is 3. Fe becomes Fe2 because the valency of oxide is 2. (NH4)3PO4 -- Ammonium Phosphate NH4 and PO4 are both polyatomic ions NH4(ammonium) has a positive 1 charge, and is the cation PO4(phosphate) has a negative three charge, and is the anion In order to balace the ionic compound, you need an over all charge of zero(or neutral charge). You have a negative three charge on phosphate so you need a positive three charge of ammonium. Therefore, you have 3 NH4 and 1 PO4
Answered by Denise - Wed Dec 3 14:07:28 2008
Q. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name. KI Fe2O3 (NH4)3PO4
Asked by I am What I Am - Wed Dec 3 14:00:32 2008 - - 1 Answers - 0 Comments
A. KI -- potassium iodine Fe2O3 --- Its Iron (III) oxide. This is because the valencies have to interchange. O (Oxygen) becomes O3 because the Fe (Iron) valency is 3. Fe becomes Fe2 because the valency of oxide is 2. (NH4)3PO4 -- Ammonium Phosphate NH4 and PO4 are both polyatomic ions NH4(ammonium) has a positive 1 charge, and is the cation PO4(phosphate) has a negative three charge, and is the anion In order to balace the ionic compound, you need an over all charge of zero(or neutral charge). You have a negative three charge on phosphate so you need a positive three charge of ammonium. Therefore, you have 3 NH4 and 1 PO4
Answered by Denise - Wed Dec 3 14:07:28 2008
From Yahoo Answer Search: 'Chemical formula of Fe2O3'
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