Which of the following pairs of factors affects the solubility of a particular substance?
Q. A.temperature and the nature of solute and solvent B. temperature and degree of mixing C. particle size and degree of mixing D. particle size and temperature
Asked by 11 - Sun Jun 1 11:39:16 2008 - - 1 Answers - 0 Comments
A. B. temperature and degree of mixing
Answered by Taha K - Sun Jun 1 11:44:04 2008
Q. A.temperature and the nature of solute and solvent B. temperature and degree of mixing C. particle size and degree of mixing D. particle size and temperature
Asked by 11 - Sun Jun 1 11:39:16 2008 - - 1 Answers - 0 Comments
A. B. temperature and degree of mixing
Answered by Taha K - Sun Jun 1 11:44:04 2008
Arrange the following five events in an order that explains the mass flow of materials in the phloem?
Q. Water diffuses into the sieve tubes leaf cells produce sugar by photosynthesis solutes are actively transproted into sieve tubes sugar is transported from cell to cell in the leaf sugar moves down the stem Question#2 which of these is incorrectly paired with its life cycle generation? Stamen-sporophyte embryo sac-gametophyte embryo-sporophyte pollen-gametophyte anther-gametophyte
Asked by Tyler M - Sun May 18 23:00:48 2008 - - 1 Answers - 0 Comments
A. Answer to question no 1--> the correct order 1. leaf cells produce sugar by photosynthesis 2. sugar is transported from cell to cell in the leaf 3. solutes are actively transproted into sieve tubes 4. Water diffuses into the sieve tubes 5. sugar moves down the stem See this site for confirmation --- --- Answer to 2nd question Stamen should not be paired with sporophyte. Because the stamens are the male parts of the flower and they are made of a stalk called the filament with an anther on top. The anther contains the pollen. Therefore it should have been... Stamen -gametophyte ( along with pollen and anther) --- See this link to check (Please GO to flower part passage) kichammi: plant sex- talks of green sex these… [cont.]
Answered by Sand - Mon May 19 17:05:36 2008
Q. Water diffuses into the sieve tubes leaf cells produce sugar by photosynthesis solutes are actively transproted into sieve tubes sugar is transported from cell to cell in the leaf sugar moves down the stem Question#2 which of these is incorrectly paired with its life cycle generation? Stamen-sporophyte embryo sac-gametophyte embryo-sporophyte pollen-gametophyte anther-gametophyte
Asked by Tyler M - Sun May 18 23:00:48 2008 - - 1 Answers - 0 Comments
A. Answer to question no 1--> the correct order 1. leaf cells produce sugar by photosynthesis 2. sugar is transported from cell to cell in the leaf 3. solutes are actively transproted into sieve tubes 4. Water diffuses into the sieve tubes 5. sugar moves down the stem See this site for confirmation --- --- Answer to 2nd question Stamen should not be paired with sporophyte. Because the stamens are the male parts of the flower and they are made of a stalk called the filament with an anther on top. The anther contains the pollen. Therefore it should have been... Stamen -gametophyte ( along with pollen and anther) --- See this link to check (Please GO to flower part passage) kichammi: plant sex- talks of green sex these… [cont.]
Answered by Sand - Mon May 19 17:05:36 2008
Of the following pairs correctly represent similar functions for a solution component and a colloid component?
Q. Your answer: A. solvent/dispersed phase B. solute/dispersion medium C. solvent/dispersion medium D. more than one response is correct
Asked by danciingstar - Wed Apr 18 22:29:42 2007 - - 1 Answers - 0 Comments
A. C. solvent/dispersion medium
Answered by ag_iitkgp - Thu Apr 19 00:01:59 2007
Q. Your answer: A. solvent/dispersed phase B. solute/dispersion medium C. solvent/dispersion medium D. more than one response is correct
Asked by danciingstar - Wed Apr 18 22:29:42 2007 - - 1 Answers - 0 Comments
A. C. solvent/dispersion medium
Answered by ag_iitkgp - Thu Apr 19 00:01:59 2007
questions on recrystallization?
Q. 1. Occasionally, a sample will not crystallize from solution on cooling, even though the solution is saturated with the solute at elevated temperature. Give a couple of remedies of methods in such cases. 2. One of the most common solvent pairs in recrystallization technique is ethanol-water, Explain what would happen to the recrystallization process if a student uses hexane instead of ethanol in the above solvent pair.
Asked by xbootylicious86x - Thu May 28 01:25:13 2009 - - 2 Answers - 0 Comments
A. 1. - Add a single solute crystal to the supersaturated solution. - Stir it with a wooden stick. - Tap or shake it. 2. The recrystallization technique is to separate impurities. Your recrystallized product should be pure, and the impurities should be left behind in the solvent. A solvent pair (cosolvent) is used when no single solvent works. Typically, you would use one solvent in which the solute is soluble at elevated temperatures, but much less soluble at at lower temperatures. (The impurity remains in the solvent, because its small amount doesn't exceed saturation.) In the case of a cosolvent, the solute is highly soluble in one solvent and much less soluble in the second. The second solvent is used to precipitate the solute. If… [cont.]
Answered by Dynamic Fetch - Thu May 28 01:50:01 2009
Q. 1. Occasionally, a sample will not crystallize from solution on cooling, even though the solution is saturated with the solute at elevated temperature. Give a couple of remedies of methods in such cases. 2. One of the most common solvent pairs in recrystallization technique is ethanol-water, Explain what would happen to the recrystallization process if a student uses hexane instead of ethanol in the above solvent pair.
Asked by xbootylicious86x - Thu May 28 01:25:13 2009 - - 2 Answers - 0 Comments
A. 1. - Add a single solute crystal to the supersaturated solution. - Stir it with a wooden stick. - Tap or shake it. 2. The recrystallization technique is to separate impurities. Your recrystallized product should be pure, and the impurities should be left behind in the solvent. A solvent pair (cosolvent) is used when no single solvent works. Typically, you would use one solvent in which the solute is soluble at elevated temperatures, but much less soluble at at lower temperatures. (The impurity remains in the solvent, because its small amount doesn't exceed saturation.) In the case of a cosolvent, the solute is highly soluble in one solvent and much less soluble in the second. The second solvent is used to precipitate the solute. If… [cont.]
Answered by Dynamic Fetch - Thu May 28 01:50:01 2009
which of the following receptors is incorrectly paired with the type of energy it transduces?
Q. -electromagnetic receptors-- magnetism -thermoreceptors-- heat -mechanoreceptors-- sound -pain receptors--electricity -chemoreceptors--solute concentrations
Asked by pageant_prissajw - Tue May 1 12:24:45 2007 - - 2 Answers - 0 Comments
A. pain receptors - electricity There are several different kinds of pain receptors, and they certainly respond to things other than electricity. If I stomp on your toe, then something other than electricity is involved. If you get cut by a razor while shaving (with a manual razor), again, no electricity is involved. Then when you put alcohol on the wound... you get the picture.
Answered by emucompboy - Tue May 1 14:19:39 2007
Q. -electromagnetic receptors-- magnetism -thermoreceptors-- heat -mechanoreceptors-- sound -pain receptors--electricity -chemoreceptors--solute concentrations
Asked by pageant_prissajw - Tue May 1 12:24:45 2007 - - 2 Answers - 0 Comments
A. pain receptors - electricity There are several different kinds of pain receptors, and they certainly respond to things other than electricity. If I stomp on your toe, then something other than electricity is involved. If you get cut by a razor while shaving (with a manual razor), again, no electricity is involved. Then when you put alcohol on the wound... you get the picture.
Answered by emucompboy - Tue May 1 14:19:39 2007
Help with some more multiple choice chemistry problems?
Q. What is the molar mass of a solute if, when 5 grams are dissolved in 100 mL of water, the water freezes at -3.9 C? Kf of water = 1.86 C/m, and the van't Hoff factor for the solute i =1. A. (5)/(3.9)(0.1)(1.86) B. (5)(1.86)/(3.9)(0.1) C. (3.9)(0.1)/ (5)(1.86) D. (5)(0.1)/((1.86) E. (0.1)(1.86)/(5)(3.9) Xe (g) reacts with F2 (g) to form a single square planar compound. If 1.0 mol of Xe is completely consumed, while a total of 20 atm of F2 (g) is available but is in excess, what is the final partial pressure of F2 remaining if the reaction is done in a 5.0L flask at 300 C? A. (5.0)(0.0821)(573)/(2) B. (5.0)(0.0821)(573)/(2) - 20 C. 20 + (5.0)/(1.0)(4) D. 20 - (2)(0.0821)(573)/(5.0) E. 20(0.0821) + (5.0)/(1.0)(4) Which pair of gases contains… [cont.]
Asked by eyanyo13 - Fri May 18 13:58:11 2007 - - 1 Answers - 0 Comments
A. delta t = i times Kf times molality. molality = moles solute divided by kilograms solvent molar mass = grams divided by moles. rearrange the third and substitute into the second; then substitute it into the first. square planar means the formula is XeF4, so write a balanced chemical equation. This will allow you to figure out the moles of F2 consumed. Using PV = nRT, you can determine the pressure the moles of F2 exert in the flask. The rest I will leave unsaid. Graham's Law if r1 divided by r2 = square root of (M2 / M1). Let r1 be equal to 2, so r2 is equal to 1 (there's the twice the rate thing). Now, solve for the ratio of the two molar masses. Find a pair with that ratio. Let us assume that A to D are all at the same temperature. [cont.]
Answered by ChemTeam - Sat May 19 09:36:02 2007
Q. What is the molar mass of a solute if, when 5 grams are dissolved in 100 mL of water, the water freezes at -3.9 C? Kf of water = 1.86 C/m, and the van't Hoff factor for the solute i =1. A. (5)/(3.9)(0.1)(1.86) B. (5)(1.86)/(3.9)(0.1) C. (3.9)(0.1)/ (5)(1.86) D. (5)(0.1)/((1.86) E. (0.1)(1.86)/(5)(3.9) Xe (g) reacts with F2 (g) to form a single square planar compound. If 1.0 mol of Xe is completely consumed, while a total of 20 atm of F2 (g) is available but is in excess, what is the final partial pressure of F2 remaining if the reaction is done in a 5.0L flask at 300 C? A. (5.0)(0.0821)(573)/(2) B. (5.0)(0.0821)(573)/(2) - 20 C. 20 + (5.0)/(1.0)(4) D. 20 - (2)(0.0821)(573)/(5.0) E. 20(0.0821) + (5.0)/(1.0)(4) Which pair of gases contains… [cont.]
Asked by eyanyo13 - Fri May 18 13:58:11 2007 - - 1 Answers - 0 Comments
A. delta t = i times Kf times molality. molality = moles solute divided by kilograms solvent molar mass = grams divided by moles. rearrange the third and substitute into the second; then substitute it into the first. square planar means the formula is XeF4, so write a balanced chemical equation. This will allow you to figure out the moles of F2 consumed. Using PV = nRT, you can determine the pressure the moles of F2 exert in the flask. The rest I will leave unsaid. Graham's Law if r1 divided by r2 = square root of (M2 / M1). Let r1 be equal to 2, so r2 is equal to 1 (there's the twice the rate thing). Now, solve for the ratio of the two molar masses. Find a pair with that ratio. Let us assume that A to D are all at the same temperature. [cont.]
Answered by ChemTeam - Sat May 19 09:36:02 2007
For one mole of substance at a given temperature, select the member in each pair with the higher entropy?
Q. For one mole of substance at a given temperature, select the member in each pair with the higher entropy. (a) HNO3(l) HNO3(aq) (b) CuSO4(s) CuSO4 x 5H2O(s) (c) KClO2(s) KClO3 (aq) For each of these, I am just looking for a double-checking answer. I only get one submission online for this problem, so I wanted to make sure that I was understanding this subject correctly. My answers were: a) HNO3 (aq) since being dissolved in a solution would increase the entropy rather than just the liquid solute alone. b) CuSO4 x 5H2O(s) I chose this one because of the molecular size, but I am a little confused about the water molecules surrounding the salt and possibly lowering the entropy of the molecule by isolating it with… [cont.]
Asked by Charleen - Wed Apr 16 13:41:52 2008 - - 1 Answers - 0 Comments
A. You are right in every case. In (b), you have more atoms that can wriggle around, is so there are more possible ways of being disorganised, and the number of equivalent states is what entropy is all about. FYI, four of the water molecules are attached to Cu2+ through the oxygen lone pairs, while the fifth one is hydrogen bonded to sulfate.
Answered by Paul B - Wed Apr 16 13:53:05 2008
Q. For one mole of substance at a given temperature, select the member in each pair with the higher entropy. (a) HNO3(l) HNO3(aq) (b) CuSO4(s) CuSO4 x 5H2O(s) (c) KClO2(s) KClO3 (aq) For each of these, I am just looking for a double-checking answer. I only get one submission online for this problem, so I wanted to make sure that I was understanding this subject correctly. My answers were: a) HNO3 (aq) since being dissolved in a solution would increase the entropy rather than just the liquid solute alone. b) CuSO4 x 5H2O(s) I chose this one because of the molecular size, but I am a little confused about the water molecules surrounding the salt and possibly lowering the entropy of the molecule by isolating it with… [cont.]
Asked by Charleen - Wed Apr 16 13:41:52 2008 - - 1 Answers - 0 Comments
A. You are right in every case. In (b), you have more atoms that can wriggle around, is so there are more possible ways of being disorganised, and the number of equivalent states is what entropy is all about. FYI, four of the water molecules are attached to Cu2+ through the oxygen lone pairs, while the fifth one is hydrogen bonded to sulfate.
Answered by Paul B - Wed Apr 16 13:53:05 2008
Please Help Chemistry?
Q. If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in solution? (1 point) 8.0 g 50 g 80 g 800 g Colligative properties depend upon the ___. nature of the solute nature of the solvent number of solute particles in a solution freezing point of a solute What is the molality of a solution containing 8.0 grams of solute in 0.50 kg of solvent? (molar mass of solute = 24 g) 0.67m 4m 1.67m 0.17m What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf = 1.86 C/m) 1.86 C 3.72 C 5.58 C 7.44 C What is the formula for phosphoric acid? H2PO3 H3PO4 HPO2 HPO4 Which of these is an Arrhenius base? LiOH NH3 H2PO4 CH3Cooh a lewis acid is a… [cont.]
Asked by Leah - Sat Mar 15 17:55:38 2008 - - 1 Answers - 0 Comments
A. Here are a few: 4% of 200g is 8 grams Collig properties are based on the number of particles Phosphoric acid is H3PO4 Lewis acids accept a pair of electrons.
Answered by Otts Shoals - Thu Mar 20 02:39:45 2008
Q. If the percent (mass/mass) for a solute is 4% and the mass of the solution is 200 g, what is the mass of solute in solution? (1 point) 8.0 g 50 g 80 g 800 g Colligative properties depend upon the ___. nature of the solute nature of the solvent number of solute particles in a solution freezing point of a solute What is the molality of a solution containing 8.0 grams of solute in 0.50 kg of solvent? (molar mass of solute = 24 g) 0.67m 4m 1.67m 0.17m What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf = 1.86 C/m) 1.86 C 3.72 C 5.58 C 7.44 C What is the formula for phosphoric acid? H2PO3 H3PO4 HPO2 HPO4 Which of these is an Arrhenius base? LiOH NH3 H2PO4 CH3Cooh a lewis acid is a… [cont.]
Asked by Leah - Sat Mar 15 17:55:38 2008 - - 1 Answers - 0 Comments
A. Here are a few: 4% of 200g is 8 grams Collig properties are based on the number of particles Phosphoric acid is H3PO4 Lewis acids accept a pair of electrons.
Answered by Otts Shoals - Thu Mar 20 02:39:45 2008
Chemistry practice quiz HELP?
Q. Hello, If anyone is kind enough to help me answer these questions I would be very greatful. Thank You So much, You are a life saver!!! Providing a brief explanation for the answers, I am reading the text book, but It just doesn't seem to go through my head. Practice Quiz 3A Fall 1 2004 1. Important functional groups of organic compounds include: a. COOH. b. NH2. c. OH. d. -PO4. e. All of the above. 2. Triglycerides belong to which group? a. Nucleic acids. b. Lipids. c. Proteins. d. Carbohydrates. e. Steroids. 3. One major difference that distinguishes a fat from a carbohydrate is: a. Covalent bonds. b. Carbon, hydrogen and oxygen. c. A Carboxylic acid group. d. Ionic bonds. e. Nitrogen atoms. 4. The chemical reaction of glycogen into… [cont.]
Asked by Tamerlane - Tue Apr 14 16:43:17 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 18 14:50:45 2009
Q. Hello, If anyone is kind enough to help me answer these questions I would be very greatful. Thank You So much, You are a life saver!!! Providing a brief explanation for the answers, I am reading the text book, but It just doesn't seem to go through my head. Practice Quiz 3A Fall 1 2004 1. Important functional groups of organic compounds include: a. COOH. b. NH2. c. OH. d. -PO4. e. All of the above. 2. Triglycerides belong to which group? a. Nucleic acids. b. Lipids. c. Proteins. d. Carbohydrates. e. Steroids. 3. One major difference that distinguishes a fat from a carbohydrate is: a. Covalent bonds. b. Carbon, hydrogen and oxygen. c. A Carboxylic acid group. d. Ionic bonds. e. Nitrogen atoms. 4. The chemical reaction of glycogen into… [cont.]
Asked by Tamerlane - Tue Apr 14 16:43:17 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 18 14:50:45 2009
Need help with HARD Math problem! Prove that for any set of 55 different integers between 1 and 100 there... ?
Q. Prove that for any set of 55 different integers between 1 and 100 there will be two integers in the set that differ by 10, and two integers in the set that differ by 12. Then show that it is possible to have a set of 55 integers between 1 and 100 where no pair of integers in the set differ by 11. Molarity = Moles of solute / Kg of solvent 2) What is the molality of a solution in which 25 g of NaCI is dissolved in 2.0 Kg of water?
Asked by Helper - Tue Jan 27 03:31:47 2009 - - 1 Answers - 0 Comments
A. Ok the first math question is tricky so I'll answer the chemistry question first. Molarity = Moles of solute / kg of solvent (solute = NaCl, Solvent = water) Moles of NaCl = 25g NaCl x 1mol = 0.427... mol of NaCl --- 58.44g Molarity = 0.427.. mol / 2 Kg of HOH = 0.2138... mol/kg Significant Digits = 0.21 mol/kg Now the math question X.X The numbers could be any numbers at all of course. You can start with 1 to 45 as the lowest term possible. The highest term would be 55 to 100. Now to answer the question. What is the largest amount of space between two numbers can be created? from 1 - 100, there can only be the largest space of 2 between each number. If you follow the pattern you must go. X = first number (whatever it is)… [cont.]
Answered by Alan XD - Tue Jan 27 03:59:23 2009
Q. Prove that for any set of 55 different integers between 1 and 100 there will be two integers in the set that differ by 10, and two integers in the set that differ by 12. Then show that it is possible to have a set of 55 integers between 1 and 100 where no pair of integers in the set differ by 11. Molarity = Moles of solute / Kg of solvent 2) What is the molality of a solution in which 25 g of NaCI is dissolved in 2.0 Kg of water?
Asked by Helper - Tue Jan 27 03:31:47 2009 - - 1 Answers - 0 Comments
A. Ok the first math question is tricky so I'll answer the chemistry question first. Molarity = Moles of solute / kg of solvent (solute = NaCl, Solvent = water) Moles of NaCl = 25g NaCl x 1mol = 0.427... mol of NaCl --- 58.44g Molarity = 0.427.. mol / 2 Kg of HOH = 0.2138... mol/kg Significant Digits = 0.21 mol/kg Now the math question X.X The numbers could be any numbers at all of course. You can start with 1 to 45 as the lowest term possible. The highest term would be 55 to 100. Now to answer the question. What is the largest amount of space between two numbers can be created? from 1 - 100, there can only be the largest space of 2 between each number. If you follow the pattern you must go. X = first number (whatever it is)… [cont.]
Answered by Alan XD - Tue Jan 27 03:59:23 2009
Polar and non-polar solutes and solvents: help these questions are urgent plz?
Q. explain which solvent below you would use to remove road salt stains from a pair of jeans water (polar), paint thinner (non-polar), salt (ionic), iodine (non-polar), citric acid (polar) potassium permangate (polar), caffaine (polar) , glycerin thank you for reading and answeruing
Asked by Quebec C - Mon Dec 10 01:33:41 2007 - - 2 Answers - 0 Comments
A. Water, salt always completely dissolves in water. here is why I would not use some of the others. Paint thinner: if they mean acetone, it most definitely IS polar, other than that, it will dissolve pretty much anything you get it on. Iodine: Solid iodine? It has a very high vapor pressure for a solid and it's toxic, and dark brown, it would stain your jeans Citric acid: I'm not going to put acid on my jeans KMnO : It's bright purple. Again with the stain Caffaine: I don't even know that that is, if you mean caffeine, what, are you going to isolate solid caffeine from coffee, I don't think so glycerin: That would work pretty well but where are you gonna get a bunch of glycerin
Answered by dustin_barr - Mon Dec 10 01:46:01 2007
Q. explain which solvent below you would use to remove road salt stains from a pair of jeans water (polar), paint thinner (non-polar), salt (ionic), iodine (non-polar), citric acid (polar) potassium permangate (polar), caffaine (polar) , glycerin thank you for reading and answeruing
Asked by Quebec C - Mon Dec 10 01:33:41 2007 - - 2 Answers - 0 Comments
A. Water, salt always completely dissolves in water. here is why I would not use some of the others. Paint thinner: if they mean acetone, it most definitely IS polar, other than that, it will dissolve pretty much anything you get it on. Iodine: Solid iodine? It has a very high vapor pressure for a solid and it's toxic, and dark brown, it would stain your jeans Citric acid: I'm not going to put acid on my jeans KMnO : It's bright purple. Again with the stain Caffaine: I don't even know that that is, if you mean caffeine, what, are you going to isolate solid caffeine from coffee, I don't think so glycerin: That would work pretty well but where are you gonna get a bunch of glycerin
Answered by dustin_barr - Mon Dec 10 01:46:01 2007
Help...... Biology Questions?
Q. 1.Uncontrolled dividing of cells is known as ___. a. cytokinesis b. mitosis c. cancer d. interphase 2.Very large molecules can enter a cell through ___. a. endocytosis b. diffusion c. exocytosis d. osmosis 3.During prophase, which of the following describes the chromosomes? a. The chromatin is in strands that are long and thin. b. The chromatin is coiled up into visible chromosomes. c. The chromatin is so tightly coiled that you cannot observe it. d. The chromatin is digested by mitotic enzymes. 4.When the concentration of solutes outside the cell is greater than the solutes inside the cell, the solution is said to be ___. a. hypertonic b. isotonic c. in… [cont.]
Asked by Nitro Driver - Tue Jun 3 13:59:21 2008 - - 4 Answers - 0 Comments
Q. 1.Uncontrolled dividing of cells is known as ___. a. cytokinesis b. mitosis c. cancer d. interphase 2.Very large molecules can enter a cell through ___. a. endocytosis b. diffusion c. exocytosis d. osmosis 3.During prophase, which of the following describes the chromosomes? a. The chromatin is in strands that are long and thin. b. The chromatin is coiled up into visible chromosomes. c. The chromatin is so tightly coiled that you cannot observe it. d. The chromatin is digested by mitotic enzymes. 4.When the concentration of solutes outside the cell is greater than the solutes inside the cell, the solution is said to be ___. a. hypertonic b. isotonic c. in… [cont.]
Asked by Nitro Driver - Tue Jun 3 13:59:21 2008 - - 4 Answers - 0 Comments
Can Anyone Help me with Biology?
Q. ___ 51. Which is NOT an element? a. water b. oxygen c. carbon d. chlorine e. hydrogen ___ 52. A molecule is a. a combination of two or more atoms. b. less stable than its constituent atoms separated. c. electrically charged. d. a carrier of one or more extra neutrons. e. none of these ___ 53. What is formed when an atom loses or gains an electron? a. mole b. ion c. molecule d. bond e. reaction ___ 54. The bond in table salt (NaCl) is a. polar. b. ionic. c. covalent. d. double. e. nonpolar. ___ 55. How do hydrophobic molecules react with water? a. attracted to b. absorbed by c. repelled by d. mixed with e. polarized by ___ 56. A hydrogen bond is a. a sharing of a pair of electrons between a hydrogen and an oxygen nucleus. b. a… [cont.]
Asked by Smiley - Wed Feb 18 13:58:38 2009 - - 2 Answers - 0 Comments
A. all of the previous answer is correct except for #60 it is C because when salt dissolves in water, it makes water more conductive of electricity because ionic compounds helps to create conductivity in water. So when it dissolves, it creates ions, making water more conductive.
Answered by Jackster - Wed Feb 18 23:56:33 2009
Q. ___ 51. Which is NOT an element? a. water b. oxygen c. carbon d. chlorine e. hydrogen ___ 52. A molecule is a. a combination of two or more atoms. b. less stable than its constituent atoms separated. c. electrically charged. d. a carrier of one or more extra neutrons. e. none of these ___ 53. What is formed when an atom loses or gains an electron? a. mole b. ion c. molecule d. bond e. reaction ___ 54. The bond in table salt (NaCl) is a. polar. b. ionic. c. covalent. d. double. e. nonpolar. ___ 55. How do hydrophobic molecules react with water? a. attracted to b. absorbed by c. repelled by d. mixed with e. polarized by ___ 56. A hydrogen bond is a. a sharing of a pair of electrons between a hydrogen and an oxygen nucleus. b. a… [cont.]
Asked by Smiley - Wed Feb 18 13:58:38 2009 - - 2 Answers - 0 Comments
A. all of the previous answer is correct except for #60 it is C because when salt dissolves in water, it makes water more conductive of electricity because ionic compounds helps to create conductivity in water. So when it dissolves, it creates ions, making water more conductive.
Answered by Jackster - Wed Feb 18 23:56:33 2009
Please help me!?
Q. 1. Explain the following on the basis of the behavior of atoms and /or ions: a) salt is used on icy roads b) adding a solute to a solvent extends the liquid phase over a larger temperature range 2. Indicate the type of crystal (molecular, metallic, covalent- network, or ionic) for each of the following a) gold b) carbon dioxide c) lithium flouride d) krypton 3. Identify types of intermolecular forces that are present in each and identify which of each pair has the higher boiling point: a) C6H14 and C8H18 b) CH3OH and CH3Sh thank you!!! I am studying for a final and cannot seem to get these! It would help so much! No, this is not my homework, it is a study guide.
Asked by - Mon Jan 7 00:52:06 2008 - - 1 Answers - 0 Comments
A. WOW! lots of questions. Here goes: 1a: Salt is an ionic compound that separates on contact with water. The addition of the ions to the water solution lowers the freezing point of the solution causing the ice to melt. 1b: same qustion in another way. Adding additional particles to the solution results in a freezing point depression and a boiling point elevation. Look in your textbook under colligative properties. 2. For these ask yourself what each element is and then ask what they do. a. Gold is a metal. Gold atoms form the metallic bond. b. Carbon and Oxygen are both non-metals. The only thing non-metals do is steal electrons from the metals or share with each other, so this is covalent sharing. c. Lithium is a metal and they only… [cont.]
Answered by Karl P - Mon Jan 7 01:12:15 2008
Q. 1. Explain the following on the basis of the behavior of atoms and /or ions: a) salt is used on icy roads b) adding a solute to a solvent extends the liquid phase over a larger temperature range 2. Indicate the type of crystal (molecular, metallic, covalent- network, or ionic) for each of the following a) gold b) carbon dioxide c) lithium flouride d) krypton 3. Identify types of intermolecular forces that are present in each and identify which of each pair has the higher boiling point: a) C6H14 and C8H18 b) CH3OH and CH3Sh thank you!!! I am studying for a final and cannot seem to get these! It would help so much! No, this is not my homework, it is a study guide.
Asked by
A. WOW! lots of questions. Here goes: 1a: Salt is an ionic compound that separates on contact with water. The addition of the ions to the water solution lowers the freezing point of the solution causing the ice to melt. 1b: same qustion in another way. Adding additional particles to the solution results in a freezing point depression and a boiling point elevation. Look in your textbook under colligative properties. 2. For these ask yourself what each element is and then ask what they do. a. Gold is a metal. Gold atoms form the metallic bond. b. Carbon and Oxygen are both non-metals. The only thing non-metals do is steal electrons from the metals or share with each other, so this is covalent sharing. c. Lithium is a metal and they only… [cont.]
Answered by Karl P - Mon Jan 7 01:12:15 2008
Can you answer any of these?
Q. any answers would help. thanks 2. The body gains solutes from all of the following processes except ___. a.secretion by cells b. metabolism c. respiration d. sweating 3. All of the following metabolic waste products are removed primarily by the urinary system except ___. a. carbon dioxide b. uric acid c. ammonia d. creatine 4. The structure that carries filtrate from the kidney to the bladder is the ___. a. ureter b. urethra c. nephron d. distal tubule 5. The kidney's central cavity is called the ___. a. kidney medulla b. renal pelvis c. renal capsule d. kidney cortex 6. The structure of the nephron which receives the substances filtered from blood is the ___. a. … [cont.]
Asked by Princess Aimey's Mama* - Wed Apr 8 00:53:52 2009 - - 1 Answers - 0 Comments
A. d a a a d b d a b no idea c either B or D not sure about 14 or 15 C C, bladder infections don't know 18 A P.S. You don't learn anything from letting other people do your homework for you, but I like the challenge and did it anyway.
Answered by Logan - Wed Apr 8 01:08:22 2009
Q. any answers would help. thanks 2. The body gains solutes from all of the following processes except ___. a.secretion by cells b. metabolism c. respiration d. sweating 3. All of the following metabolic waste products are removed primarily by the urinary system except ___. a. carbon dioxide b. uric acid c. ammonia d. creatine 4. The structure that carries filtrate from the kidney to the bladder is the ___. a. ureter b. urethra c. nephron d. distal tubule 5. The kidney's central cavity is called the ___. a. kidney medulla b. renal pelvis c. renal capsule d. kidney cortex 6. The structure of the nephron which receives the substances filtered from blood is the ___. a. … [cont.]
Asked by Princess Aimey's Mama* - Wed Apr 8 00:53:52 2009 - - 1 Answers - 0 Comments
A. d a a a d b d a b no idea c either B or D not sure about 14 or 15 C C, bladder infections don't know 18 A P.S. You don't learn anything from letting other people do your homework for you, but I like the challenge and did it anyway.
Answered by Logan - Wed Apr 8 01:08:22 2009
chemistry question 10 points?
Q. Which of the following pairs of factors affects the solubility of a particular substance? a.) temperature and the nature of solute and solvent b.) temperature and degree of mixing c.) particle size and degree of mixing d.) particle size and temperature
Asked by hi im lost - Thu Mar 26 23:00:38 2009 - - 2 Answers - 0 Comments
A. This is not a particularly well-constructed question. But the answer is not (d). The correct answer is (a). The solubility of a substance depends on the temperature. Increasing the temperature will usually increase the solubility of a solid in water, while an increase in temperature will decrease the solubility of a gas in water. The second factor deals with the individual chemistry of the solute and solvent. The solubility rules are a good example of this. Particle size doesn't affect the solubility, it only affects the RATE at which a solute dissolves, not whether it dissolves. And "degree of mixing" is pretty much meaningless.
Answered by pisgahchemist - Thu Mar 26 23:13:07 2009
Q. Which of the following pairs of factors affects the solubility of a particular substance? a.) temperature and the nature of solute and solvent b.) temperature and degree of mixing c.) particle size and degree of mixing d.) particle size and temperature
Asked by hi im lost - Thu Mar 26 23:00:38 2009 - - 2 Answers - 0 Comments
A. This is not a particularly well-constructed question. But the answer is not (d). The correct answer is (a). The solubility of a substance depends on the temperature. Increasing the temperature will usually increase the solubility of a solid in water, while an increase in temperature will decrease the solubility of a gas in water. The second factor deals with the individual chemistry of the solute and solvent. The solubility rules are a good example of this. Particle size doesn't affect the solubility, it only affects the RATE at which a solute dissolves, not whether it dissolves. And "degree of mixing" is pretty much meaningless.
Answered by pisgahchemist - Thu Mar 26 23:13:07 2009
From Yahoo Answer Search: 'solute pairs'
Thu Oct 22 07:39:22 2009 [ refresh local cache ]
