#1
sorry bout making a thread for this, but i'm mid chemistry coursework and i for the life of me can't remember units of concentration in solution

any answers?

thanks in advance
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#2
moles 1 molar concentration is the reletie mass in grams but dont quote me on that
#3
cheers man
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#6
cheers!
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#7
No a mole is 1x10(power of 26) of any substance I believe... I thought concentration was g/dm(cubed)? Something like that? I've dropped chem now though so im also not sure
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#8
A mole is 6.022×10^23 molecules (Avogadro's number) - one mole of a substance will be the relative atomic mass in grams.
Last edited by TheShadow at Sep 19, 2007,
#9
Quote by Peanut1614
No a mole is 1x10(power of 26) of any substance I believe... I thought concentration was g/dm(cubed)? Something like that? I've dropped chem now though so im also not sure



It can be in g/dm^3 too, if i remember correctly...
#10
Quote by Chimpy101
moles per decimeter cubed


ai ai, cap'n

concentration is measured in moles per liter, i.e. decimeter cubed.
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#11
Yup well 1 mol of atoms weighs as much as the atom-number the atom has I thought (in grams).

Making 1 mol of H weighing 1 gram and 1 mol of O weighing 12 grams (or something similar)
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#12
No man, that's not how it works. Moles and molar atomic mass are different things.

edit: nvm i'm dumb.
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#13
its molar per dm hes after. I'm guessing GCSE rates of reaction course work

I swear one mole is the amount of a substance needed to weight one g?
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#14
Nope. One mole is the Avogadro constant, i.e. 6.022x10^26

Thus, one mole of Carbon is it's molar atomic weight (12)x(6.022e26)
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