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help in chemistry ..A sample of propane, C3H8, contains 11.7moles of carbon atom

Chemistry
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A sample of propane, 

C3H8, contains 11.7moles of carbon atoms. How many total moles of atoms does the sample contain?
Apr 27th, 2015

C3H8 has 3 carbon atoms, 3C~11.7moles

So answer is 11.7 moles/3=2.9 moles, the sample contain

Moles of H atom is 2.9 moles*8=23.2 moles

Total number of moles of carbon and hydrogen=11.7moles+23.2moles=34.9moles


Apr 27th, 2015

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