Question

One mole of an alkane on combustion produced four moles of H20 How many moles of CO2 is produced in this reaction​

Answer 1

Answer:

3 moles of C02

Explanation:

Let us first write the generic reaction of an alkane burning in the presence of oxygen

First we look at the reaction of methane.

(CH4) + 2O2 == CO2 + 2H20

Here one mole of alkane would produce 2 moles of water

Now we look at the reaction of ethance.

2C2H6 + 7O2 == 4CO2 + 6H20

Here one mole of alkane would produce 2 moles of water

Now we look at the reaction of propane

C3H8 + 5O2 == 3CO2 + 4H20

Here one mole of alkane would produce 4 moles of water. This satisfies the condition so the alkane is propane and moles of CO2 produced are

Answer 2

Answer:

Answer:4.5 moles

..

Take the total mass (72) and divide by the molar mass (16) and you will calculate the moles of CH4, which is 4.5. Since each mole of CH4 consumed produces one mole of CO2, you can say that you will produce 4.5 moles of CO2.