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Topic: Limiting Chemical Reactions  (Read 2119 times)

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Offline kirstenhc

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Limiting Chemical Reactions
« on: February 21, 2012, 06:37:32 PM »
Q: When C5H12 burns in oxygen gas, carbon dioxide, and water are produced. How many grams of carbon dioxide are produced when 33.8 grams of C5H12 react with 131.4 grams of oxygen gas.

« Last Edit: February 21, 2012, 07:00:05 PM by kirstenhc »
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Offline UG

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Re: Limiting Chemical Reactions
« Reply #1 on: February 21, 2012, 07:32:28 PM »
Any ideas how to start? Can you write a balanced chemical equation for the reaction? Do you know how to calculate number of moles of C5H12 and oxygen gas given their masses?
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Offline Vidya

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Re: Limiting Chemical Reactions
« Reply #2 on: February 22, 2012, 04:07:22 AM »
remember hydrocarbons on combustion give  CO2 and H2O
now convert
gm of C5H12 -----> moles of C5H12 --->moles of CO2
gm of O2 -----> moles of O2 --->moles of CO2
the one which gives you less number of moles of the CO2 is the limiting reactant.
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