10 POINTS!! CHEMISTRY HELP!!

DON't LEAVE!! I know it looks like a lot!! PLEASE ANSWER AS MANY QUESTIONS AS YOU CAN!!!


1. The rusting of iron is represented by the following equation:

4Fe + 3O2 → 2Fe2O3

If you have a 1.76-mol sample of iron, how many moles of Fe2O3 will there be after the iron has rusted completely?

0.587 mol

0.880 mol

1.17 mol

1.76 mol

2. What is the study of the mass relationships among reactants and products in a chemical reaction?

stoichiometry

empirical formula

electron configuration

periodic law

3. Which of the following would not be studied in the branch of chemistry called stoichiometry?

the mole ratio of aluminum and chlorine in aluminum chloride

the amount of energy required to break the ionic bonds in calcium fluoride

the mass of carbon produced when a known mass of sucrose decomposes

the number of moles of hydrogen that react completely with a known quantity of oxygen

4. The Haber process for producing ammonia commercially is represented by the following equation:

N2(g) + 3H2(g) → 2NH3(g)

To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?

1.0 mol

2.0 mol

3.0 mol

6.0 mol

5. For the reaction represented by the equation AgNO3 + NaCl → NaNO3 + AgCl, how many moles of silver chloride, AgCl, are produced from 7.0 mol of silver nitrate AgNO3?

1.0 mol

2.3 mol

7.0 mol

21 mol

6. For the reaction represented by the equation SO3 + H2O → H2SO4, how many grams of sulfur trioxide are required to produce 4.00 mol of sulfuric acid in an excess of water?

80 g

160 g

240 g

320 g

7. For the reaction represented by the equation Cl2 + 2KBr → 2KCl + Br2, how many grams of potassium chloride can be produced from 300 g each of chlorine gas and potassium bromide?

98.7 g