Calculate the molar mass of a gas if a $0\mathrm{.}839g$ sample at $15\mathrm{.}1$atm occupies a volume of $87\mathrm{.}5mL$ at $49C.$

A$.1\mathrm{.}21\frac{g}{m}ol$

B$.1\mathrm{.}99\frac{g}{m}ol$

C$.2\mathrm{.}67\frac{g}{m}ol$

D$.5\mathrm{.}55\frac{g}{m}ol$

E$.16\mathrm{.}8\frac{g}{m}ol$