partial pressure problem, please help?

Question

Mixtures of helium and oxygen are used in scuba diving tanks to help prevent the bends, which is a condition caused by nitrogen bubbles forming in the bloodstream. If 95 L of oxygen and 25 L of helium at STP are pumped into a scuba tank with a volume of 8.0 L, what is the partial pressure of each gas in the tank and what is the total pressure in the tank at 25°C?

Answer 1

First you need to covert C degrees in to Kelvin which is add 273 to the 25 C which equals K, then you have to follow the gas laws STP occupies a volume of 22.4 L the ideal gas law is PV=nRT