Question

The molecular weight of magnesium oxide is _______.

Answer 1

Molecular weight: It is defined as the sum of atomic masses of all atoms in a molecule.

Magnesium oxide:

• It is an organic salt which is composed of magnesium and oxygen atoms.
• It is also called as magnesia having molecular formula $\mathrm{MgO}$.
• The atomic weight of magnesium is $24.305u$ and that of oxygen is $16u$. Hence, the total molecular weight of magnesium oxide is $40.305u$ ($24.305+16$).

Thus, the molecular weight of magnesium oxide is 40.305 u.