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# Nitrous Oxide and Oxygen

APCHEM-7EFDJ1

Dinitrogen monoxide (AKA nitrous oxide) reacts with oxygen gas according to the unbalanced equation:

$${ \_ \_ N }_{ 2 }O(g)+{ \_ \_ \_ O }_{ 2 }(g)\rightarrow { \_ \_ \_ NO }_{ 2 }(g)$$

Given the following legend and the reaction mixture shown below, answer the question that follows.

If the reaction mixture is ignited by a spark, and assuming that it goes to completion, which of the following statements describes the final composition of the system?

A

Eight molecules of nitrogen dioxide are produced. Two molecules of each reactant remain.

B

Eight molecules of nitrogen dioxide are produced. Oxygen gas is the limiting reactant and is totally consumed.

C

Eight molecules of nitrogen dioxide are produced. Nitrous oxide is the limiting reactant and is totally consumed.

D

Twelve molecules of nitrogen dioxide are produced. Nitrous oxide is the limiting reactant and is totally consumed.