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Confused about -3 and 3 after dm units? watch

1. I read somewhere that it can be written as dm3 or dm-3 how are these the same thing? Also for concentration like mol L-1 why does it have the -1 written after it thank you.

2. mol/dm3 = mol dm-3

Instead of dividing moles by dm3, you are multiplying moles by 1/dm3 (dm-3), which is the same thing.
I read somewhere that it can be written as dm3 or dm-3 how are these the same thing? Also for concentration like mol L-1 why does it have the -1 written after it thank you.

is this in rates?

often while calculating the rate constants, the -3 gets inverted, but usually concentration is written as

the -1 just means that there is this many of this per mole, like x many grams per mole
4. Thank you guys that was very helpful!! ^_^
Thank you guys that was very helpful!! ^_^
no problem sweet cheeks

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Updated: January 3, 2013
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