The brown color of smog is due to the presence of nitrogen dioxide, NO₂. Nitrogen monoxide (NO) , a by-product of combustion of fossil fuels, reacts with oxygen to produce NO₂ in the atmosphere:
2 NO + O₂ $\rightarrow$ 2 NO₂
If 0.65 mole of NO is reacted with 0.75 mole of O₂ to produce NO₂, the limiting reactant is ________.

Question

The brown color of smog is due to the presence of nitrogen dioxide, NO₂. Nitrogen monoxide (NO) , a by-product of combustion of fossil fuels, reacts with oxygen to produce NO₂ in the atmosphere:
2 NO + O₂

\rightarrow

2 NO₂
If 0.65 mole of NO is reacted with 0.75 mole of O₂ to produce NO₂, the limiting reactant is ________.

Quizplus · Accepted Answer

The reaction requires 2 moles of NO for every 1 mole of O2. Given 0.65 moles of NO and 0.75 moles of O2, NO will run out first because it does not have the required 2:1 ratio with O2, making NO the limiting reactant.

The Brown Color of Smog Is Due to the Presence →\rightarrow→

The Brown Color of Smog Is Due to the Presence $\rightarrow$