Question

Gaseous ammonia chemically reacts with oxygen O2 gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of nitrogen monoxide produced by the reaction of 1.4mol of ammonia. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.

Answer 1

The first step to solve this problem is to write the chemical equation involved:

$4NH_3+5O_2\to4NO+6H_2O$

Use the mole ratio of ammonia to nitrogen monoxide which is 4:4 or 1:1 to find the moles produced by the given amount of ammonia:

$1.4molNH_3\cdot\frac{4molNO}{4molNH_3}=1.4molNO$

It means that the answer is 1.4 moles of nitrogen oxide.