Chapter 5, Problem 66E

Air bags are activated when a severe impact causes asteel ball to compress a spring and electrically ignite adetonator cap. This action causes sodium azide ${\text{(NaN}}_{\text{3}}\text{)}$ to decompose explosively according to the followingreaction:

${\text{2NaN}}_{\text{3}}\text{(}s\text{)}\to \text{2Na(}s{\text{)+3N}}_{\text{2}}\text{(}g\text{)}$

What mass of ${\text{NaN}}_{\text{3}}\text{(s)}$ must be reacted to inflate an airbag to 70.0 L at STP?