The balanced equation for the reaction is :-
CH₄(g) + 2O₂(g) ---------> CO₂(g) + 2H₂O(l)
Molar mass of CH₄ = 16 g/mole
Molar mass of O₂ = 32 g/mole
Molar mass of H₂O = 18 g/mole
Molar mass of CO₂ = 44 g/mole
Now we calculate the number of moles of reactants,
moles of CH₄ = mass of CH₄/molar mass of CH₄ = 10/16 =
0.625
Moles of O₂ = mass of O₂/molar mass of O₂ = 40/32 = 1.25
Now, as per the balanced reaction, for complete reaction
to occur, one mole of CH₄ require 2 moles of O₂
Thus, 0.625 moles of CH₄ requires 1.25 moles of O₂
both CH₄ and O₂ are present in the exact required
quantity.
Hence, moles of CO₂ formed = moles of CH₄ reacted = 0.625
Mass of CO₂ formed = moles of CO₂ x Molar mass of CO₂ =
0.625 x 44 = 27.5g
Moles of H₂O formed = moles of O₂ reacted = 1.25g
<span>Thus, mass of H</span>₂O formed = moles of H₂O x molar mass of
H₂O = 1.25 x 18 = 22.5g
