Does anyone know if relative formula mass and molar mass are the same thing please??

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:s i'm kinda confused on this :s....

could anyone help me out please...

thanks.. :)

Posted Thu 17th May, 2012 @ 17:18 by Muzz :P

6 Answers

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I think they are different but I'm not really sure...

Answered Thu 17th May, 2012 @ 17:29 by LaurenE
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ok... thanks soo much for your help...


Answered Thu 17th May, 2012 @ 17:41 by Muzz :P
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Basically the Mr of an element (molar mass) is the atomic mass of the element, which you can see on the periodic table , for example carbon would have an Mr of 12. The Ar however would be the formula mass of COMPOUNDS which is basically adding all the molar masses up , for example for C02 it would be 44 ( 12 (Mr of Carbon) + 16 x 2 (Mr of Oxygen times by two as there are two of them) ) 

Answered Thu 17th May, 2012 @ 20:18 by Lamise Hassan
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Thanks for all the help..... points taken on board... :)

Answered Thu 17th May, 2012 @ 20:53 by Muzz :P
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I know it can be written Mr so I guess it is the same!

Answered Thu 17th May, 2012 @ 17:40 by Hannah
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I think they're the same thing, the molar mass is basically the relative formula mass but in grams.

so a RFM of 20 would be a molar mass of 20g


Answered Thu 17th May, 2012 @ 17:37 by Terrie
Edited by Terrie on Thu 17th May, 2012 @ 17:38