teggenspiller

1. The problem statement, all variables and given/known data

A nitrogen in the container (molar mass is 28 g/mol) has a pressure of 2.5 atm, a volume of 0.2 m3, and a temperature of 300C. What is the mass of the nitrogen?

2. Relevant equations

first figure how many
moles there are

n=PV/RT

however, i need to use Pressure, Pa, and not in atmospheres.
3. The attempt at a solution
how do i figure the pressure in Pa, and not atm. or can I use atm?
hmmmm