# Question #1df25

Sep 8, 2017

Approximately $102 a m u$ with that assumption in mind.

#### Explanation:

With the assumption that you mean $100 a m u$...

Hydrogen has an atomic mass of approximately $1 a m u$.

Thus, with ${H}_{2} O$ in mind, it's as easy as:

$100 a m u + 2 \cdot 1 a m u \approx 102 a m u$