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Old September 18th, 2006, 10:41
jruiz3 jruiz3 is offline
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Default empirical formula - Please help

A compound with molar mass 180.2 g/mol has the following composition:
C 60.0%
H 4.48%
O 35.5%

Determine the empirical formula?
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Old September 18th, 2006, 17:55
yhtu22 yhtu22 is offline
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do you have a solutions manual?
I can take a guess at this one... but would feel better if you knew what was the correct answer and then work from there.

is it C9H804
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Old September 19th, 2006, 11:59
RobJim RobJim is offline
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Figure out what the mass of each element is by multiplying it's percentage by the total mass. Then, divide each of those masses by the molar mass of that element. This will give you the number of moles of that element. Then, you should be able to see that the molar amounts of the elements are all integer multiples of some number. Divide each of them by that number.
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Old September 19th, 2006, 14:44
jruiz3 jruiz3 is offline
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Default thank you!

I want to thank you both. yhtu22 for the correct answer and RobJim for the steps to solve the problem.
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