Question

When 2.5 moles of oxygen gas (o2) are consumed in their reaction, _____ mol of carbon dioxide are produced?

Answer 1

The reaction is not given here but we take an example reaction to understand how to calculate moles.

Let the balanced equation for the reaction is
C3H8 (g) + 5 O2 (g) → 3CO2 (g) + 4 H2O (g)

From here 5 moles of oxygen produces 3 moles of carbon dioxide

So 2.5 moles of oxygen produces 2.5/5 x 3 = 0.5 x 3 = 1.5 moles of carbon dioxide