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Topic: How to i convert g/mol to mol% g/dm3 mg/ml  (Read 16342 times)

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Offline Aetos

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How to i convert g/mol to mol% g/dm3 mg/ml
« on: November 05, 2011, 02:35:13 PM »
 ???
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Offline Hunter2

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #1 on: November 06, 2011, 07:05:06 AM »
Not really.

g/mol is unit of the molar mass.

the others are units of contents.
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Offline Aetos

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #2 on: November 06, 2011, 02:50:33 PM »
so there is no way to do it? is that what you are saying. because thats the question on my homework sheet or more specifically it says:

Given that the RMM of the drug is 360g/mol, convert your answer into the unit of:

mol%
g/dm3
mg/ml
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Offline Mitch

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #3 on: November 06, 2011, 03:08:30 PM »
They didn't give you any other information? Like the volume of the solution the drug is dissolved in?
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Offline rtm

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mol%
« Reply #4 on: November 16, 2011, 12:07:29 PM »
Hi there im abit stuck on a similar question too, basically you have to work out Concentration of drug in the original serum in units of mM i worked that out to be 0.00512 mM, then after that it says Given that the RMM of the drug is 360g/mol, convert your answer into units of:
____mol%

____g/dm3

____mg/ml

im abit stuck on this bit, could anyone give advice on how to do this thanks
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Offline Hunter2

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #5 on: November 17, 2011, 12:47:45 AM »
I guess mM means milli molar. So it is 0.00512 mM = 0.00512 mmol/l

With the molecular weight you can calculate the others.
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Offline Aetos

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #6 on: November 17, 2011, 06:01:16 PM »
i got 0.053mM ...


so 0.053 would be equal to 0.053 mmol/l

but i still dont understand how i would convert this into

mol%
g/dm3
mg/ml

@rtm - similar? thats almost the same. do we go to the same uni by any chance?
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Offline UG

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #7 on: November 17, 2011, 06:08:24 PM »
What do they mean by mol%?
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Offline Aetos

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #8 on: November 17, 2011, 06:40:10 PM »
im not entirely sure what they mean by mol%  although i may have a vague idea of how to work that one out.

how about the other 2? how do i work those out?
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Offline UG

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #9 on: November 17, 2011, 06:49:41 PM »
You have the concentration in mmol/L, and you want to convert to g/L (which is the same as g/dm3). Hint: use the molar mass. Once you have it in g/L converting it to mg/mL should be straightforward.
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Offline Aetos

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #10 on: November 17, 2011, 07:17:49 PM »
is g/L (grams per litre) the same as mol/L(moles per litre)
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Offline UG

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #11 on: November 17, 2011, 07:20:13 PM »
No the two are not the same, if you want to convert moles to grams you need to multiply by the molar mass. The relationship is m = n x M where m = mass, n = moles and M = molar mass.
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Offline Aetos

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #12 on: November 17, 2011, 07:33:11 PM »
oh i see!!!

so is this correct?

Converting 0.053mM into g/dm3:
0.053 x 360 = 19.08 g/dm3

also to convert g/dm3 to mg/ml do i divide it by 1000000? or 1000? or neither?
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Offline Aetos

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #13 on: November 17, 2011, 07:43:28 PM »
never mind I get it now >.<

after i get the mass I divide by 1000 to get g/dm3

and g/dm3 is the same as mg/ml
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Offline UG

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Re: How to i convert g/mol to mol% g/dm3 mg/ml
« Reply #14 on: November 17, 2011, 07:44:53 PM »
Yeah exactly, you need the units in moles first, 0.053 mmol = 0.000053 mol. Then you multiply by the molar mass to get 0.01908 g of the substance.
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