886 mole of no is mixed with 0503 mol of o 2 a

In one experiment 0.886 mole of NO is mixed with 0.503 mol of O
2
.
a. Calculate which of the two reactants is the limiting reagent. (5 points)
b. Calculate also the number of moles of NO
2
produced. (5 points)
c. What reactant is left over and how much of it is left over?
(5 points)
(Reference: Chang 3.83)
4
Copyright © 2014 by Thomas Edison State College. All rights reserved.

8. Propane (C
3
H
8
) is a component of natural gas and is used in domestic cooking and
heating. It burns according to the following reaction:
C
3
H
8
+ O
2
→ CO
2
+ H
2
O
a. Balance the equation representing the combustion of propane in air. (5 points)
b. How many grams of carbon dioxide can be produced by burning 20.0 pounds of propane,
the typical size of a BBG grill propane tank? Assume that oxygen is the excess reagent in
this reaction. (5 points)
9. Hydrogen fluoride is used in the manufacture of Freons (which destroy ozone in the
stratosphere) and in the production of aluminum metal. It is prepared by the reaction
CaF
2
+ H
2
SO
4
→ CaSO
4
+ 2HF
In one process 6.00 kg of CaF
2
are treated with an excess of H
2
SO
4
and yield 2.86 kg
of HF. Calculate the percent yield of HF. (5 points)
(Reference: Chang 3.89)
5
Copyright © 2014 by Thomas Edison State College. All rights reserved.

10. Certain race cars use methanol (CH