# What is the molecular weight of NaOH?

##### 1 Answer
Dec 14, 2015

$40$ $\text{g/mol}$

#### Explanation:

Take the sum of the molar masses of each element.

$\text{molar mass of Na} = 22.990$ $\text{g/mol}$
$\text{molar mass of O} = 15.999$ $\text{g/mol}$
$\text{molar mass of H} = 1.008$ $\text{g/mol}$

The sum is $39.997$ $\text{g/mol}$. This can be rounded to an even $40$ $\text{g/mol}$.