Question

Gasoline is 87% carbon and 13% hydrogen (by mass). If a vehicle’s gas tank has 3.0 kg  of gasoline, how many kg of CO₂ will that tank of gas produce (assume it’s all burned).

Answer 1

For solving any reaction based questions, always try to understand the stoichiometry of the reaction involved and apply mole balance... I have tried to explain the solution in the best possible way... Hope you get it....
13% solution :- Given data in the question :- Page-1 Mass of gasoline 3 kg % of carbon in gasaline 87% % of hydrogen in gasoline Now from above data, we can calculate the mass of carbou in 3 kg gasoline, which ů 87% of 3 3 kg . Mass of Carbou in 3 kg gasaline - 87 x 3 100 2.61 kg = We know that :- Atomic mass of carbon = 12 G.m.u. No. of moles of carbon = Mass of carbon atomie mass of Carbou O 2.61 kmoles, = 12 0.2175 kmoles. As we can assume complete combustion (as given in the question). We can write the combustion equation for carbon. C to, Now we can see from above equation, that the number of moles of co produced is equal to number of carbon burut. Co₂ 2 moles

= LPAGE-2] .. No. of moles of co, produced no. of moles of carbon buut 0.2175 kmoles (cabulated Now, we know that, Molecular mass of co 49 mass of CO₂ produced no. of moles X Molecular Massico, 0.2175 X 44 9.57 kg.
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