Question

mment Score: 63.3% Resources Hint Check Answer cion 22 of 24 > A boy with pneumonia has lungs with a volume of 1.8 L that fill with 0.075 mol of air when he inhales. When he exhales, his lung volume decreases to 1.4 L. Enter the number of moles of gas that remain in his lungs after he exhales. Assume constant temperature and pressure. mol

Answer 1

According to Ideal gas equation, PV = nRT

Here, P, T and R are constants. So, Volume V is directly proportional to number of moles n

V/n = constant

V​​​​​​1 /n​​​​​​1 = V​​​​​​2 /n 2

1.8 L /0.075 mol = 1.4 L /n​​​​​​2 mol

n​​​​​​2 = 0.05833 mol

Answer: n = 0.05833 mol