How many moles of nitrogen gas will occupy a volume of 8.3 L at 720 mmHg and 27oC?

Answer 1

Use the ideal gas law and solve for moles (n).

PV = nRT

n = PV/RT

P = pressure = 720 mm Hg

V = volume = 8.3 L

R = gas constant = 62.36 L-mm Hg/K-mol

T = temperature in K = 27 + 273 = 300K

Plug in the values and solve for n

n = 0.32 moles