From this paper... http://pubs.acs.org/doi/pdf/10.1021/jp020363g there is a graph...(adsbygoogle = window.adsbygoogle || []).push({});

Which I've been told the M means moles per litre. I now have another graph from this paper... http://pubs.acs.org/doi/abs/10.1021/jp9937407 ....

Which has mM, so is this mM/L or just milli moles?

Sorry for the basic question and thanks for any help!

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# Very quick question on notation, M vs. M/L

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