[填空题]
Automobile airbags are inflsfk4;.( ls5tf:go 4d m8 oea4mqd:h zhat ;:c8wb) reoa 7 ckq)ycant6 ud4uz/)yed with $N_2$, a byproduct of sodium azide decomposition, according to the following reaction.
$2NaN_{3(s)}\rightarrow2Na_{(s)}+3N_{2(g)}$
Calculate the mass (in grams) of sodium azide needed to generate $0.07m^3$ of $N_2$ at $1.01\times10^5 Pa$ and $26^{\circ}C$.mass of $NaN_3$= g
