Question

5.6 liters of methane gas is ignited in oxygen gas calculate the number of moles of carbon dioxide produced

Answer 1

5.6 litres of CH4 has .25 moles of C.
When complete combustion takes place
the reaction is
CH4+2O2→CO2+2H2O
So .25 moles of CO2 is formed.

Answer 2

Answer: 0.25 moles

Explanation: Combustion of methane is represented by:

$CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)$

According to Avogadro's law, 1 mole of every gas occupies 22.4 Litres at STP.

Thus from the balanced chemical equation:

22.4 L of methane produces= 1 mole of carbon dioxide.

5.6 L of methane will produce=$\frac{1}{22.4}\times 5.6=0.25 moles$ of carbon dioxide.