# How do you calculate the molar masses of the following atmospheric molecules: CO and N_2O?

$\text{Molar mass of carbon monoxide,}$ =(12.011+15.999)*g*mol^-1=?*g*mol^-1.
$\text{Molar mass of nitrous oxide,}$ =(2xx14.01+15.999)*g*mol^-1=?*g*mol^-1.