# A 5.00 L flask contains 0.02 moles oxygen at 22°C, what is its pressure, in kilopascals? What is the pressure in atm?

##### 1 Answer

The pressure of the gas is **10 kPa** or **0.1 atm**.

This looks like the time to apply the Ideal Gas Law:

#color(blue)(|bar(ul(PV = nRT)|)# ,

where

#P# is the pressure#V# is the volume#n# is the number of moles#R# is the gas constant#T# is the temperature

We can rearrange the Ideal Gas Law to get

To calculate the pressure in atmospheres, repeat the calculation using the value