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Number of moles

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Number of moles

Post  peter2108 on Wed Jan 19, 2011 7:34 am

This is a very basic 'newbie' question. From a problem: "NC is the total number of moles of carbon (as CO2)". Since a mole of a substance is a number like a dozen but bigger it seems that 1 mole of CO2 should also be 1 mole of C and 2 moles of O. Is this so?


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Post  harsha_tiger07 on Mon May 23, 2011 10:40 am

Yes it must In 1 mole CO2 molecule there will be 1 mole of carbon atoms and 2 moles of oxygen atoms. in other words 2 moles of oxygen atoms and 1 mole of molecular oxygen are one and the same since oxygen is a diatomic molecule.
It will be better understood if you look at it the other way around i.e.
1 mole of atomic carbon reacts with 1 mole of molecular oxygen to give 1 mole of CO2

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