# What is the formula for calculating the pressure of a gas?

##### 1 Answer

Nov 5, 2016

#### Answer:

Most gases closely follow an equation of state called the ideal gas law,

#### Explanation:

It's important to pay attention to the units, however. In strict SI units (highly recommended), express n in moles, R is the universal gas constant

The other common set of units is where V is in liters (L) and

Example:

0.25 mol of helium gas confined to a 6L vessel at 250K will have a pressure equal to