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Calculation mass of alcohol in a solution (volume% is given)

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A mouthwash contains 22.5% alchohol by mass. If the bottle of mouthwash contains 350 mL, what is the mass, in g, of alcohol?

Using the (m/v)%= Mass of solute (g)X100
Volume of solution(mL)

So far, I have:

Step 1. 22.5% alcohol= 22.5g alcohol
100 mL solution
Step 2. 350 mL mouth wash

and this is where I loose it.

Step one was given to me by my professor, however, I don't really know how to set up this problem ...... HELP!

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Solution Summary

The formula for calculation is given with a short explanation.

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