What is the molar mass of magnesium oxide?
Answer:
\(40.31 \mathrm{~g} \cdot \mathrm{mol}^{-1}\)
Explanation:
How did I know this? Well, I have access to a Periodic Table, and you should have access to one as well.
The Periodic Table tells us that the molar mass of oxygen is \(15.99 \mathrm{~g} \cdot \mathrm{mol}^{-1}\), and the molar mass of magnesium is \(24.31 \mathrm{~g} \cdot \mathrm{mol}^{-1}\). Sum these masses to get the molar mass of magnesium oxide.
What do I mean by molar mass?