If 2.0 mol of propane are burned (reacted with oxygen), how many moles of carbon dioxide will be produced? C3H8 (g) + 5 O2(g) → 3 CO2 (g) + 4 H2O (g)

I just want to make sure the answer is 6 mol of CO2 will be produced.

Looks ok to me.

To find the number of moles of carbon dioxide produced when 2.0 moles of propane (C3H8) are burned, we need to use the balanced chemical equation that you provided:

C3H8 (g) + 5 O2(g) → 3 CO2 (g) + 4 H2O (g)

According to the balanced equation, for every 1 mole of C3H8, we get 3 moles of CO2. Therefore, to calculate the number of moles of CO2 produced, we can use a proportion:

2.0 mol C3H8 × (3 mol CO2 / 1 mol C3H8) = 6.0 mol CO2

So, you are correct. When 2.0 moles of propane are burned, 6.0 moles of carbon dioxide will be produced.