[填空题]
Automobile airbags are inf/v:r) mz0,p1 7raiwu 2t)y, lfwuzwh jlated ff:kd3-9 r blc-nqmu,with $N_2$, a byproduct of sodium azide decomposition, according to the following reaction.
$2NaN_{3(s)}\rightarrow2 Na_{(s)}+3N^{2(g)}$
Calculate the mass (in grams) of sodium azide needed to generate $0.07m^3$ of $N^2$ at $1.01\times10^{5}Pa$ and $26.0^{\circ}C$.$n_{N2}$= mol, mass of $NaN_3$= g
