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April 20, 2026, 04:53:04 pm

Author Topic: Molar volume?  (Read 617 times)  Share 

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Starlight

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Molar volume?
« on: June 09, 2012, 08:37:18 pm »
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Hey can someone help me with this question :P

A student, running late for an important chemistry lecture, expels 36L of carbon dioxide on her way to the lecture theatre. What mass of the carbon in the carbon dioxide is exhaled by the student. Assume that the molar volume of Co2 is 24L/mol in the prevailing atmospheric conditions.

The answer says 18 but I keep getting 66.

This is what I try to do: n= V/vm
                                    n= 36/(24) = 1.5

1.5 x (44) = 66 g??

2012-2014. BSc: Neuroscience. University of Melbourne.
2015-2018. Doctor of Optometry. University of Melbourne.

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Lesliel1

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Re: Molar volume?
« Reply #1 on: June 09, 2012, 08:45:57 pm »
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Its asking for the mass of carbon
n (CO2)= 36/(24) = 1.5 =n(c)
n(C)= 1.5 x 12= 18g
 i think :D
2011: Bio [45] Psych [41]
2012: Methods Further  English  Chem

Starlight

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Re: Molar volume?
« Reply #2 on: June 09, 2012, 08:51:25 pm »
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Its asking for the mass of carbon
n (CO2)= 36/(24) = 1.5 =n(c)
n(C)= 1.5 x 12= 18g
 i think :D

Ah right! Haha I make such stupid mistakes, Thanks! :)
2012-2014. BSc: Neuroscience. University of Melbourne.
2015-2018. Doctor of Optometry. University of Melbourne.

Unlikely to respond to any PMs these days.