Question

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

Answer;

= 1.38 moles

Step-by-step 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