Numerical Methods $($Graph$)$

$1\mathrm{.}37$ Show how the second virial coefficient of a gas and its molar mass can be obtained by plotting $\frac{P}{}$ versus $P,$ where $$ is the density of the gas. Apply this method to the following data on ethane at $300K.$

$\backslash$table$[[$P$/$bar$,1,10,20],[\frac{}{{10}^{-3}}gc{m}^{-3},1\mathrm{.}2145,13\mathrm{.}006,28\mathrm{.}235]]$