# What pressure (in torr) is exerted by 10.0 g of O2 in a 2.50 L container at a temperature of 27 degree C?

##### 1 Answer

The pressure exercited by the gas will be

So, you know that you have a certain amount of gas, **10.0 g** to be exact, in a **2.5-L** container at *in atm*, then use a simple conversion factor to go from atm to torr.

The number of moles of oxygen present in the container is

So,

Since 1 atm is defined as being equal to 760 torr, you'll get

Rounded to two sig figs, the number of sig figs given for 27 degrees Celsius, the answer will be