A chemist places 1.72 mil of O2(g) and 2.88 mil of H2(g) into a rigid and sealed 7.50 L container.

a) calculate the total pressure in the container at 405 K
b) at low temperatures, the total pressure in the container is less than the value predicted using the Ideal Gas Law. Explain this phenomenon
c) a lab technician ignites the mixture in the container and the following reaction occurs: 2H2(g) + O2(g) —> 2H2O(g). Find the partial pressure of 02(g) in the container at 405 K after the reaction has gone to completion.

I'm confused. Does mil your abbreviation for mol or mL. And if it is mL what are the conditions at which the volume was measure; i.e., If you are place 1.72 mL O2 INTO a sealed container then we need to know the volume before those gases were introduced into the container. Please clarify.