What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP) ?

Given:

2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)

Required:

volume of CL2

Solution:

Use the ideal gas law

PV = nRT

V = nRT/P

V = (2.1 moles Cl2) (0.08203 L - atm / mol - K) (273K) / (1 atm)

V = 47 L