Question

What mass, in grams, of chlorine gas (Cl2) is contained in a 15.5 liter tank at 25.5 degrees Celsius and 1.98 atmospheres? Show all of the work used to solve this problem.

Answer 1

pV=nRT --> n= pV/RT
now just transfer all units to standard (K, Pa, m3) and put it in upper equation and than:
n=m/M -> m= n*M
and that's all