Question

determine the mass of carbon dioxide produced during the complete combustion of 2.31g of this hydrocarbon fuel (ethanol)

Answer 1

C₂H₅OH+3O₂=3H₂O+2CO₂ 

$n(C2H5OH)=\frac{m}{M}=\frac{2.31}{46,069}=0.05$

$\frac{0.05}{1}=\frac{x}{2}$

x=0.1

$m(CO2)=n\times M=0.1\times44.0095=4.4$