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posted by  Shakendel on 11/9/2007 4:33:47 PM  |  status: Live  

Determining the number of moles

Course Textbook Chapter Problem
General Chemistry N/A N/A N/A
Question Details:
Determine the number of moles in 625 L of H2 gas at STP.
 
I got 27.9 mol. Is this answer correct?

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posted by JennE on 11/9/2007 6:28:39 PM  |  status: Live
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Shakendel's comment:
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yup it's correct...
 
# of moles = volume given/STP (22.4). In your case, 625/22.4 is 27.9
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posted by Cellinda on 11/9/2007 6:29:31 PM  |  status: Live
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 Yes, you are correct!!! 
 
 Please don't forget to rate my response.  I truly appreciate it.
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posted by Sarah21 on 11/9/2007 8:07:29 PM  |  status: Live
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Shakendel's comment:
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Response Details:
Good job, you are correct!
 
Remember that at STP,you can always use the relation 1 mole = 22.4 liters as a conversion factor thus:
 
625 liters * ( 1 mole / 22.4 liters)  = 27.9 moles
Hope this helps!  Please take the time to rate my answer accordingly.  Thanks! 
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