Maryanni S.

asked • 07/13/18

percentages.

A mixture of alcohol and water contains a total of 36 oz of liquid. There are 9 oz of pure alcohol in the mixture. What percent of the mixture is water? What percent is alcohol?

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J.R. S. answered • 07/13/18

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Ph.D. in Biochemistry--University Professor--Chemistry Tutor
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% is given as parts out of the whole.  In this case the whole is 36 oz   The part represented by alcohol is 9oz. Thus, the % alcohol is 9/36 (x100%) = 25%
% water = 100% = 25% = 75%
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Arthur D.

tutor
Hi J.R.S., I think the problem is 36 oz of liquid and 9 oz of pure alcohol. I see the numbers getting repeated a lot. The students  probably hold down the keys too long or something. Anyway, I thought I would share this with you. I would be very surprised if I'm wrong. 
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07/13/18

J.R. S.

tutor
You’re probably correct as the numbers given would be unusual. Hopefully the explanation, even with incorrect values, made sense to the OP. 
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07/13/18

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