Can relative mass help you "count by weighing" or get a "relative count" of things?

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