General Chemistry

Question

You are provided with 3.88 mol of nitrogen monoxide gas. Using 2NO(g) +1O2(g) 2NO2(g), determine how many moles of of oxygen gas are needed to completely react with the nitrogen monoxide gas and how many moles of nitrogen dioxide are formed as a result?

Answer 1

Based on the chemical equation 2 NO + O₂ → 2 NO₂, we know that the moles of O₂ is half the amount of NO, and the moles of NO₂ is equal the moles of NO (You can understand the equation like: 2 mol of NO reacts with 1 mol of O₂ gas to form 2 moles of NO₂).

Therefore, the moles of O₂ is half the given amount of NO: 3.88/2 = 1.94 mol

Moles of NO₂ is the same as the moles of NO= 3.88 mol.

Hope this helps.