The feed to a reactor that produces ammonia $($NH:$),$ by the reaction N$2+3$H$22$NHs$,$ contains $20\%$ N$2($by mass$)$ and $80\%$ H$2($by mass$).$ The feed rate is $1000$ kg$/$h$.$ Determine:a$.$ The feed rate of N$2$ in kg$/$hb$.$ The molar mass of the feedc. The feed rate of Ha in mol$/$h