Question

How many moles of C0₂are produced when 5.15 mol of ethane is burned in an excess of oxygen?

A. 10.3 mol
B. 15.45 mol
C. 20.6 mol
D. 25.75 mol

Answer 1

When 5.15 moles of ethane are burned in an excess of oxygen, 10.3 moles of CO2 are produced according to the stoichiometry of the reaction.So the correct option is A.

Step-by-step explanation:

The question asks about the stoichiometry of a combustion reaction involving ethane (CH3CH3). The balanced chemical equation is:

2 CH3CH3 (g) + 7 O2 (g) → 4 CO2 (g) + 6 H2O (g)
According to the stoichiometry of this reaction, two moles of ethane yield four moles of carbon dioxide. Therefore, if 5.15 moles of ethane are burned, the number of moles of carbon dioxide produced would be:

(5.15 moles of CH3CH3) x (4 moles of CO2 / 2 moles of CH3CH3) = 10.3 moles of CO2
Hence, the correct answer is A. 10.3 mol of CO2.