Oxygen is contained in a 1 cubic meter cylinder at 30 degree

Oxygen is contained in a 1 cubic meter cylinder at 30 degree C and a gage pressure of 1 Mpa. What is the mass of the oxygen?

Solution

Mass,m =PV/RT

P= 1*10^6 N/m^2

V=1 m^3

T= 303K

R= Ru/M

= 8314.34/32

= 259.823 J/kg-K

Therefore, m= 1*10^6*1/(259.823*303)

= 12.7 kg