Car airbags include sodium azide, $\text{NaN}_3$, together with an excess of potassium nitrate, $\text{KNO}_3$. During a car crash, the reactions shown below take place, forming nitrogen. This makes the airbag inflate very quickly. $2\text{NaN}_3 \rightarrow 2\text{Na} + 3\text{N}_2$ $10\text{Na} + 2\text{KNO}_3 \rightarrow \text{K}_2\text{O} + 5\text{Na}_2\text{O} + \text{N}_2$ How many moles of nitrogen gas are formed in total when $1\ \text{mol}$ of sodium azide, $\text{NaN}_3$, decomposes inside an airbag?
- A1.5
- B1.6
- C3.2
- D4.0