# What is the molar mass of magnesium oxide?

Mar 6, 2016

$40.31$ $g \cdot m o {l}^{-} 1$
The Periodic Table tells us that the molar mass of oxygen is $15.99$ $g \cdot m o {l}^{-} 1$, and the molar mass of magnesium is $24.31$ $g \cdot m o {l}^{-} 1$. Sum these masses to get the molar mass of magnesium oxide.