A hydrocarbon, containing only C and H, can react with excess oxygen gas to produce carbon dioxide and water. The result of the complete reaction of an unknown hydrocarbon with formula CxHy is shown in the table. What is the formula of the hydrocarbon?

Question

anonymous · Answer

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abmon98 · Answer

Use the final mass of Water to find out the number of moles and this will represent the number of hydrogen atoms present in hydrocarbon.

anonymous · Answer

I got .333 mol h2o but what does that mean

abmon98 · Answer

no 54/18=3 mole of H2O

anonymous · Answer

oh oops wrong way 
so does that mean for every 3 molecules H there's 1 carbon?

anonymous · Answer

A.	C2H6
B.	C6H14
C.	C12H26
D.	C8H18

abmon98 · Answer

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abmon98 · Answer

for every 1 mole of H2O we have 2 hydrogen atoms in the hydrocarbon.

anonymous · Answer

So since I have 3 moles of H2O There's 6 H atoms in the hydrocarbon so the answer is A?

abmon98 · Answer

yes thats correct.

anonymous · Answer

answer was D :/