22 Grams of CO₂ and 8 grams of methane together contain the following carbon atoms

44g of CO₂ contain N_A atoms of 'C'

22g of CO₂ contain 'X₁' atom of C

X₁ =$\frac{{\mathrm{N}}_{\mathrm{A}}}{2}$

16g of CH₄ contain N_A atoms of 'C'

8g of CH₄ contain 'X₂' atoms of C

X₂ =$\frac{{\mathrm{N}}_{\mathrm{A}}}{2}$

Total number of 'C' atoms =$\frac{{\mathrm{N}}_{\mathrm{A}}}{2}+\frac{{\mathrm{N}}_{\mathrm{A}}}{2}={\mathrm{N}}_{\mathrm{A}}=6.023 \mathrm{x} {10}^{23}$