At $218$C

$,$ Kc$=1\mathrm{.}2$times $10\mathrm{⁴}$

for the equilibrium process:

NH$4$SH$($s$)$NH$3($g$)+$H$2$S$($g$)$

$.$If the volume of the flask is $1\mathrm{.}30$ L

$,$ what is the minimum mass of NH$4$SH$($s$)$

that must be added to the flask to reach equilibrium?

Express the mass in grams to three significant figures.