Identify the following as empirical formulas or molecular formulas and indicate any uncertainty with (?): (a) CMgCl2 (b) C2H2 (c) BaF2 (d) C8H18 (e) CH4 (f) S8 Click here to see the answer
(24.0K)
What is the formula weight for each of the following compounds? (a) Copper(II) sulfate (b) Carbon disulfide (c) Calcium sulfate (d) Sodium carbonate Click here to see the answer
(21.0K)
What is the mass percentage composition of the elements in the following compounds? (a) Fool's gold, FeS2 (b) Boric acid, H3BO3 (c) Baking soda, NaHCO3 (d) Aspirin, C9H8O4 Click here to see the answer
(75.0K)
Write balanced chemical equations for each of the following unbalanced reactions: (a) SO2 + O2 → SO3 (b) P + O2 → P2O5 (c) Al + HCl → AlCl3 + H2 (d) NaOH + H2SO4 → Na2SO4 + H2O (e) Fe2O3 + CO → Fe + CO2 (f) Mg(OH)2 + H3PO4 → Mg3(PO4)2 + H2O Click here to see the answer
(11.0K)
Identify the following as combination, decomposition, replacement, or ion exchange reactions:
(a) NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl ↓
(b) H2O(l) + CO2(g) → H2CO3(l) (c) 2 NaHCO3(s) → Na2CO3(s) + H2O(g) + CO2(g) (d) 2 Na(s) + Cl2(g) → 2 NaCl(s) (e) Cu(s) + 2 AgNO3(aq) → Cu(NO3)2(aq) + 2 Ag(s) (f) CaO(s) + H2O(l) → Ca(OH)2(aq) Click here to see the answer
(18.0K)
Write complete, balanced equations for each of the following reactions:
(a) C5H12(g) + O2(g) →
(b) HCl(aq) + NaOH(aq) →
(c) Al(s) + Fe2O3(s) →
(d) Fe(s) + CuSO4(aq) →
(e) MgCl(aq) + Fe(NO3)2(aq) →
(f) C6H10O5(s) + O2(g) → Click here to see the answer
(16.0K)
Write complete, balanced equations for each of the following decomposition reactions. Include symbols for physical states, heating, and others as needed: (a) Solid potassium chloride and oxygen gas are formed when solid potassium chlorate is heated. (b) Upon electrolysis, molten bauxite (aluminum oxide) yields solid aluminum metal and oxygen gas. (c) Upon heating, solid calcium carbonate yields solid calcium oxide and carbon dioxide gas. Click here to see the answer
(6.0K)
Write complete, balanced equations for each of the following replacement reactions. If no reaction is predicted, write "no reaction" as the product:
(a) Na(s) + H2O(l) →
(b) Au(s) + HCl(aq) →
(c) Al(s) + FeCl2(aq) →
(d) Zn(s) + CuCl2(aq) → Click here to see the answer
(10.0K)
Write complete, balanced equations for each of the following ion exchange reactions. If no reaction is predicted, write "no reaction" as the product:
(a) NaOH(aq) + HNO3(aq) →
(b) CaCl2(aq) + KNO3(aq) →
(c) Ba(NO3)2(aq) + Na3PO4(aq) →
(d) KOH(aq) + ZnSO4(aq) → Click here to see the answer
(13.0K)
The gas welding torch is fueled by two tanks, one containing acetylene (C2H2) and the other pure oxygen (O2). The very hot flame of the torch is produced as acetylene burns,
Click here to see the answer
(24.0K)