Answer :
1) List what you have and what you are looking for.
P = 163.6 kPa
V = ?
n = 2.2 mol
R = 8.314
T = 37.9°C / 311.05K (immediately convert to kelvin)
2) Rearrange your formula, input values, then calculate.
[tex]PV = nRT\\ V=\frac{nRT}{P} \\ V=\frac{(2.2)(8.314)(311.05)}{(163.6)} \\ V=34.77599841[/tex]
V = 35 L