Ans :
Number of mol of CO2 = mass / molar mass
= 356.4 g / 44.01 g / mol = 8.1 mol
mol H2O = 145.9 g / 18.01528 g/mol = 8.1 mol
Mol H = 2 x 8.1 mol = 16.2 mol
So the ratio of C and H atoms in the hydrocarbon = 8 : 16
The molecular formula of the hydrocarbon will be C8H16
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