How to convert Percent solution into molarity and molarity into percent solution

In this video lecture, we solve numerical problems in chemistry/biology on how to convert percent solution into molarity and molarity into percent solution
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[@investincrypto2859]

Thank you very much for uploading this. Very helpful

[@BiologyLectures]

Glad it was helpful!

[@myskia-chiro]

in the second example, since it is converted to weight percent why is it divided by 10 and not multiplied by 100?

[@Hari788]

Excellent work

[@BiologyLectures]

Thank you! Cheers!

[@dikshyapanthi7681]

Excellent

[@BiologyLectures]

Thanks

[@user-ns2dx4mh7x]

What’s with the 10 is it always like that or just for these 2 examples

[@BiologyLectures]

It is always like that. It is the formula

[@mitra2028]

what is formula weight?

[@BiologyLectures]

Formula weight or molecular weight are the same for example formula weight for H2O is 18.

[@ViolentDeathh]

Hi, does this work for %(v/v) solutions?

[@BiologyLectures]

It will only work when the density of the substance is 1 Kg/m3. Otherwise, if the density given is otherwise, please convert volume to mass using the density value and then use the same formula to calculate Molarity.