# URGENT HELP!! Combustion analysis questions A2

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#1
I can never seem to wrap my head around the questions where they ask you to calculate the empirical formula. The ones where they give you the initial mass of the hydrocarbon and the mass of CO2 and H2O produced are simple enough, but how do you calculate these type?

For example,
Complete combustion of a hydrocarbon produced 0.66g of CO2 and 0.225g of H2O. Which of the following formulae (molecular) is consistent with this data?

A. C3H6
B. C3H8
C. C656
D. C6H10

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2 years ago
#2
Answers not A but D...could someone please explain how answer is D i get until calculation of empirical formula after i dnt knw why molecular formular is C6H10 but not C3H6
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