Question

When 21.3 moles of c3h8 burn in excess oxygen how many moles of co2 will be formed?

Answer 1

21.3 moles of C3H8 will produce 63.9 moles of CO2 when burned in excess oxygen.

Step-by-step explanation:

From the balanced equation C3H8 + 5O2 → 3CO2 + 4H2O, we can see that for every mole of C3H8 that burns, 3 moles of CO2 are produced. Therefore, when 21.3 moles of C3H8 burn in excess oxygen, 21.3 moles multiplied by the mole ratio of CO2 to C3H8 (3:1), which is 3, will give us the number of moles of CO2 that will be formed.

Number of moles of CO2 = 21.3 moles x 3 = 63.9 moles of CO2.

Answer 2

63.9moles

Step-by-step explanation:

Given parameters:

Number of moles of C₃H₈ = 21.3moles

Unknown parameter:

Number of moles of CO₂ produced = ?

Solution

In order to find the number of moles of carbon dioxide produced we must first write the balanced reaction equation.

This reaction is a combustion of hydrocarbon reaction. It usually occurs in the presence of excess oxygen gas and the product is water and carbon dioxide.

The reaction equation is shown below:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

From the equation:

1 mole of C₃H₈ produced 3 moles of CO₂

Therefore, 21.3 moles of C₃H₈ will produce (21.3 x 3)moles of CO₂

The number of mole of carbon dioxide produced is 63.9moles