When 2.5 mol of O2 are consumed in their reaction, mol of CO2 are produced

The given question is incomplete. The complete question is:

The combustion of propane (C3H8) in the presence of excess oxygen yields and

When only 2.5 mol of are consumed in order to complete the reaction, ________ mol of are produced.

Thus when 2.5 mol of are consumed in their reaction,  1.5 mol of are produced

Explanation:

The balanced chemical equation is:

According to stoichiometry :

5 moles of produce = 3 moles of  

Thus 2.5 moles of will produce = moles of  

Thus when 2.5 mol of are consumed in their reaction,  1.5 mol of are produced

14,16 18 reacts with group

im pretty sure its b