Calculate the number of moles of oxygen in a 16.3-L tank if the pressure is 331 kPa and the temperature is 197.4°C.

Answer;

= 1.38 moles

Explanation;

Using the equation;

PV = nRT, where P is the pressure,. V is the volume, n is the number of moles and T is the temperature and R is the gas constant, 0.08206 L. atm. mol-1.

P = 331 000Pa or 3.267 atm T = 197.4 + 273 = 470.4, V = 16.3 L

Therefore;

n = PV/RT

= (3.267 * 16.3) / (470.4 * 0.08206)

= 1.3796 moles

≈ 1.38 moles