Nitric acid no reacts with oxygen gas to form

7. Nitric acid (NO) reacts with oxygen gas to form nitrogen dioxide (NO
2
), a dark
brown gas:
2NO( g ) + O
2
( g ) → 2NO
2
(
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)
g )
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
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)
2
O
O
2
3
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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
+
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)
2HF