Question

The combustion of propane C,H, produces carbon dioxide and steam.

CH,(8) + 50,(8) — 3C0,(8) + 4H2O(1)
How many moles of CO2 are produced when 7.5 mol of propane are burned in an excess of oxygen?
A. 15 mol
B. 23 mol
C. 3.8 mol
D. 2.5 mol

Answer 1

23 moles

Step-by-step explanation:

Given data:

number of moles of propane = 7.5 mol

Number of moles of carbon dioxide produced = ?

Solution:

Chemical equation:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Now we will compare the moles of propane and carbon dioxide.

C₃H₈ : CO₂

1 : 3

7.5 : 3/1×7.5 = 22.5

22.5≅ 23 moles