Is alcohol 'proof' a vol/vol or mass/mass percentage?

Subject: Is alcohol 'proof' a vol/vol or mass/mass percentage?

Date: Thu Apr 6 22:34:54 2000
Posted by Gary Thorpe
Grade level: teacher/prof School: Beverly Hills High School
City: Beverly Hills State/Province: CA Country: 90212
Area of science: Chemistry
ID: 955078494.Ch

Message:


I am working on the 3rd edition of Cliffs AP Chemistry Preparation Guide.  
I need to know this to correct a possible error in the 2nd edition.  I had 
alcohol proof as a mass/mass percentage, but a professor at UCLA said it 
was a vol/vol percentage.  I looked at your answer to 'proof' but it not 
answer this specific question.

Re: Is alcohol 'proof' a vol/vol or mass/mass percentage?

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