posted a question

1. Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this quiz.

To answer this question, use the hydrazinenitrogen tetroxide rocket fuel reaction:

2N2H4 + N2O4 3N2 + 4H2O

You are given 96 g of N2H4 and 92 g of N2O4. How many grams of N2 will this reaction produce? Hint: This is a limiting reactant problem.
(Points : 1)
42 g

63 g

84 g

126 g


2. For the Haber process, N2 + 3H2 2NH3, which mole ratio would you use to calculate the yield of ammonia when given hydrogen?
(Points : 1)
1 : 2

3 : 2

2 : 1

3 : 1


3. For the oxidation of glucose (C6H12O6 + 6O2 6H2O + 6CO2), how many moles of oxygen will it take to consume 6 moles of glucose?
(Points : 1)
2

6

12

36


4. You are asked to make 112 g of iron from iron oxide and excess carbon monoxide.

Fe2O3 (s) + 3CO (g) 2Fe (l) + 3CO2 (g)

Approximately how many grams of iron oxide must you use?
(Points : 1)
240 g

107 g

160 g

720 g


5. When calcium carbonate is heated, it breaks down into calcium oxide and carbon dioxide.

CaCO3 (s) CaO (s) + CO2 (g)

If you heat 25 g CaCO3, approximately what volume of carbon dioxide will you make? Assume the conditions of temperature and pressure are such that 1 mole of any gas will occupy 22.4 L.
(Points : 1)
1.0 L

5.6 L

11.2 L

22.4 L