24. Solid ammonium dichromate decomposes as under:

${\left(N{H}_4\right)}_{2}C{r}_2{O}_7\to N_2+C{r}_2{O}_3+4H_{2}O$
If 63 g of ammonium dichromate decomposes. Calculate:

$$\begin{gathered} \left(a\right) the quantity in moles of {\left(N{H}_4\right)}_{2}C{r}_2{O}_7 \\ \left(b\right) the quantity in moles of nitrogen formed \\ \left(c\right) the volume of N_2 evolved at STP. \\ \left(d\right) what will be the loss of mass? \\ \left(e\right) calculate the mass of chromium \left(III\right) oxide formed at the same time. \end{gathered}$$