Question

Nitrogen dioxide, a major air pollutant, can be produced by the combustion of nitrogen oxide as shown.


2NO + O2 Right arrow. 2NO2


In a plant, 1,500 kg of nitrogen oxide is consumed per day to produce 1,500 kg of nitrogen dioxide per day. What is the percent yield?
Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..
21.7%
32.6%
43.5%
65.2%

Answer 1

Percent yield = (actual / theoretical) × 100.

From 2 NO → 2 NO2, 1 mol NO gives 1 mol NO2, so theoretical mass = mass(NO) × (Molar mass NO2 / Molar mass NO).

M(NO) = 30.01 g/mol, M(NO2) = 46.01 g/mol.

Theoretical NO2 = 1500 kg × (46.01 / 30.01) ≈ 2299.7 kg.

Percent yield = (1500 / 2299.7) × 100 ≈ 65.2%.

Answer: 65.2%