Empirical formula prob.

  • #1

Homework Statement



A whole class of compounds is composed of just carbon and hydrogen, the "hydrocarbons". If a 7.81 g sample of a hydrocarbon was analyzed and the carbon was converted to 26.4g of CO2 what is the empirical formula?

Homework Equations



No clue what converted means... and how a part of the sample increases in mass...

The Attempt at a Solution




Choices

a) CH b)CH10 c)C2H10 d)C10H e)C10H2
 

Answers and Replies

  • #2
Borek
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I see your confusion.

7.81 g of hydrocarbon was burnt in exess oxygen, 26.4 g of CO2 were produced.

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methods
 
  • #3
symbolipoint
Homework Helper
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"Converted" means the hydrocarbon reacted with oxygen at a high temperature, and the carbon was all burned to carbon dioxide.
 

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