2NO (g) + O2 (g) → 2NO2 (g) If a sample of 2.00 moles of nitric oxide (NO) gas was reacted with excess oxygen, how many moles of nitrogen dioxide (NO2) gas would be produced

Two moles of nitrogen dioxide (NO2) gas would be produced

Explanation:

In this balanced chemical equation we can see that

2 moles of nitrogen mono oxide reacts with one mole of oxygen to produce two moles of nitrogen dioxide.

Since this is a balanced equation, we can deduce that two moles of  nitrogen mono oxide will produce two moles of nitrogen dioxide (NO2) gas