Help on chemical equations??? 10 points?
Q. a. combustion of benzene b. nitric acid and magnesium c. silver nirtrate and calcium chloride d. synthesis of stannic sulfide
Asked by Lauren C - Tue May 26 16:08:38 2009 - - 2 Answers - 0 Comments

Questions on chemistry naming.?
Q. Please correct the following for me, I'm not that sure about my answers. ZnBr2 zinc(II) bromide H2Se(g) dihydrogen selenium H2Se(aq) selenic acid Au2S gold(II) sulfide GeBr4 germanium(IV) bromide stannic sulfide SnS4 cupric bisulfate Cu(SO4)2 Also, do you indicate roman numeral for all metals or only certain elements? If only certain elements, what are they?
Asked by corona7w - Thu Sep 13 00:59:51 2007 - - 1 Answers - 0 Comments

A. You provide Roman numerals for the transition elements only... the 2 exceptions are Zinc and Silver. Zinc is always a +2 and Silver is always a +1. All the rest need the Roman Numerals. So ZnBr2 is Zinc Bromide ( no II) Au2S and GeBr4 look right. For compounds of 2 nonmetals, you MUST put a Prefix on the second word. You only add a prefix to the first word if its more than one. So H2Se needs a prefix before selenium... For the acid.. If its a binary acid (only H and one other element) you need to add Hydro- to the name while still keeping the -ic acid ending... for the old naming method, -ic means the higher charge... so Stannic would be Tin +4, so thats correct. Cupric would be +2 but Bisulfate is usually HSO4 and its a -1 charge...… [cont.]
Answered by itutorchem - Thu Sep 13 01:10:43 2007

Write the formulas for the following compounds:?
Q. -hydrogen gas sulfuric acid porassium phosphite hydrobromic acid sodium hypochlorite calcium carbonate stannic hydroxide cobalt(VI) Chloride golf(III) Chloride barium sulfate carbon tetrachloride ammonium sulfide chromium (III) nitrate mercurous carbonate stannic hydroxide cuprous oxide sodium phosphate nickel (II) nitrate please help!!!
Asked by katirox04 - Wed Feb 27 10:21:05 2008 - - 1 Answers - 0 Comments

A. hydrogen gas = H2 sulfuric acid = H2SO4 potassium phosphite = KPO3 ?? hydrobromic acid = HBr sodium hypochlorite = NaClO3 calcium carbonate = CaCO3 stannic hydroxide = Sn(OH)3 cobalt(VI) Chloride = CoCl3 gold(III) Chloride = AuCl3 barium sulfate = BaSO4 carbon tetrachloride = CCl4 ammonium sulfide = (NH4)2S chromium (III) nitrate = Cr(NO3)3 mercurous carbonate = Hg2CO3 stannic hydroxide = Sn(OH)3 cuprous oxide = Cu2O sodium phosphate = Na2PO4 nickel (II) nitrate = Ni(NO3)2
Answered by Roger S - Wed Feb 27 10:28:16 2008

Naming compounds...?
Q. Can someone tell me if I did these right? (yes all the number are subscripts) Given name write formula: magnesium hydroxide - Mg(OH)2 bromine pentafluoride - BrF5 iron (III) sulfate - Fe2(SO4)3 sodium thiosulfate - Na2S2O3 calcium carbonate - Cu2CO3 cuprous bicarbonate - CuHCO zinc sulfide - ZnS tetrasulfur tetranitride - S4N4 ammonium fluoride - NHF4 stannic cloride - SnCl4 Given formula, write name Ba3(PO4)2 - Barium phosphate N2F4 - Dinitrogen Tetrafluoride PH3 - Phophorus trihydride AgC2H3O2 - Silver (I) Acetate Sr(ClO3)2 - Strontium Clorate Pb3N2 - Lead (II) Nitride P2O5 - Diphophorous Pentoxide Cr(NO3)3 - Chromium (III) Nitrate KMnO4 - Potassium Permanganate NaHCO3 - Sodium Bicarbonate THANKS!!!
Asked by Cole - Sun Aug 26 13:46:51 2007 - - 3 Answers - 0 Comments

A. Take another look at calcium carbonate (Ca not Cu) and Ca is +2 Also, ammonium fluoride - not sure, but I think it's NH3F Everything else looks good
Answered by KennyB - Sun Aug 26 13:58:26 2007

Question of Chemistry (1st year High School)?
Q. You have the nomenclature of salts, Type structural formula for them.: a) Sodium carbonate b) aluminum carbonate c) magnesium sulphate d) manganous sulfate e) sulfide manganic f) sodium sulfide g) of silver sulfide h) of calcium phosphate i) zinc phosphate j) phosphite tin II k) phosphite stannic l) magnesium bromide m) of potassium pyrophosphate n) perchlorate manganous o) chlorate manganic p) iodide auroso q) chlorite auric r) potassium chloride s) cyanate copper I tons) of copper cyanide II u) hipoiodito magnesium v) periodate Zinc x) iodate, manganese II z) fluoride manganic
Asked by Guilherme - Fri Dec 12 09:21:57 2008 - - 2 Answers - 0 Comments

A. use your periodic table. the ate in carbonate means with oxygen so the symbol for the 1st one is Na2CO3 (the numbers are subscripts) as for the ones with the roman numerals behind them, they are transition metals and the number indicated shows the # of valence electrons, the periodic table is gonna be ur bet friend this year, good luck
Answered by My name isn't important - Fri Dec 12 09:30:20 2008