A sample of a substance containing only C and H... - JAMB Chemistry 1997 Question

A sample of a substance containing only C and H burns in excess O₂ to yield 4.4g of CO₂

and 2.7 g of H₂O. The empirical formula of a substance is?

(C = 12, O = 16, H = 1)

CH₃

CH₂

CH₄

C₂H₂₄

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Correct Option: A

C_xH_y + (x + y/4)O₂ = XCO₂ + (y/2)H₂O

                    4.4          2.7<br />

according to the equation 44x = 9y

             Carbon Hydrogen <br />

mole given ratio = (44)/(44), (2.7)/(9) = 0.1,0.3

Empirical formula = (0.1)/(0.1), (0.3)/(o.1) = 1,3 ; CH₃

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