danny_boy

Hey,

I know Daltons are a measure of molecular weight. So, if I have 180 kDa with is 180000 Daltons, and I want to convert this to g/mol, how do I do this ?

Daniel_

One Dalton is one AMU (atomic Mass Unit).

One AMU is 1/12th of the weight of a Carbon 12 Atom.

One Mole is the molecular weight expressed as grammes - so a mole of Carbon 12 is BY DEFINITION exactly 12 grammes.

The number of atoms in a mole is equal to Avogadro's number (6.023 x 10^23)

If you think about these facts using Carbon 12 as an example, you see that it has a mass of 12 Daltons, and also weighs 12g/mol.

The simple answer is, to convert from Daltons to g/mol, MULTIPLY BY ONE.

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╔═════════════════════════════════════════╗
Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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danny_boy

Thank you....

Heehawhum

That was ridiculously thorough. Show off :-P

Daniel_

Erm - it was almost two years ago too!

But thanks - I guess the brace of Chemistry degrees helped.

__________________

╔═════════════════════════════════════════╗
Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
╚═════════════════════════════════════════╝

Herk

Haha, old topics rule, but since it is back. Is there a reason for distinguishing between Daltons and g/mol? Can they be used interchangeably, or is there connotation differences beyond the math equality?

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-Blind faith runs into things!-

Daniel_

I think it's basically an SI units thing.

Daltons were named after the scientist, but as they are a derived unit, the SI dictated that they ought to be written as g/mol (which are both real measurables).

__________________

╔═════════════════════════════════════════╗
Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
╚═════════════════════════════════════════╝

loqk

ridiculously thorough, but very handy. i'm doing honours in biomed science and we were trying to work out the diference while ordering supplies.

this helped a lot

thanks daniel_ :-)

i also found a page from some years ago discussing the pros and cons of making the dalton an SI unit

and ps. thanks for introducing me to this forum through finding this topic in google