## Chemistry 12th Edition

We know that: $n=\frac{PV}{RT}$ $n=\frac{0.97\times 5.4}{0.0821\times 317}$ $n=0.20moles$ Now $M=\frac{m}{n}$ We plug in the known values to obtain: $M=\frac{7.10}{0.20}=35.1\frac{g}{mol}$