Nitrogen reacted with oxygen, while the mass of nitrogen oxide = 14.7 g.

Nitrogen reacted with oxygen, while the mass of nitrogen oxide = 14.7 g. Find: The volume of oxygen and nitrogen, the reaction proceeds under normal conditions.

Given:
m (NO) = 14.7 g
To find:
V (O2)
V (N2)
Decision:
N2 + O2 = 2NO
n (NO) = m / M = 14.7 g / 30 g / mol = 0.49 mol
n (NO): n (O2): n (N2) = 2: 1: 1
n (O2) = n (N2) = 0.49 mol / 2 = 0.245 mol
V (O2) = V (N2) = n * Vm = 0.245 mol * 22.4 L / mol = 5.488 L
Answer: 5.488 L