Problem: Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation:3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)Suppose that 4.5 mo NO2 and 0.40 mol H2O combine and react completely. Which reactant is in excess?

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from NO2

4.5 mol NO2×2 mol HNO33 mol NO2 = 3 mol HNO3


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Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation:

3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)

Suppose that 4.5 mo NO2 and 0.40 mol H2O combine and react completely. Which reactant is in excess?

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