Question

how many moles of methane are required to produce 22g c02 after combustion? pl show the calculation with explanation.

Answer 1

the equation for the reaction is
CH4+2O2---------CO2+2H2O

the equation shows that 1 mole of methane produces one mole of CO2 that is 44 g of CO2

but the given mass of CO2 is 22g which is half of 44g or 0.5 mole of CO2 (no of moles=given mass/molar mass)

from equation we can see that 0.5 moles of CO2 will consume 0.5 moles of methane
1 mole CO2-------1 mole CH4
0.5 moles CO2---------0.5 moles CH4