# What does the ideal gas law allow a scientist to calculate that the other gas laws do not?

Nov 18, 2015

The number of moles of the gas can be calculated from the ideal gas law, as well as the gas constant.

#### Explanation:

Only the ideal gas law includes a variable for moles and the gas constant.

The equation for the ideal gas law is $P V = n R T$, where $n$ is moles, and $R$ is the gas constant.

To solve for moles, rearrange the equation to $n = \frac{P V}{R T}$.

To solve for the gas constant, rearrange the equation to $R = \frac{P V}{n T}$.