SOLUTION: How much pure acid is in 780 milliters of a 12 percent solution

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Question 899219: How much pure acid is in 780 milliters of a 12 percent solution

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Twelve percent as how? Which acid? Volume? Mass?

The question as stated is not sufficient!

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If that is how the question is written, you could use the information to do some arithmetic, but the answer means nothing without the proper information which currently is missing.

You can do this arithmetic correctly and the answer can still be wrong:
780%2AmL%2A%2812units%2F100%2AotherUnits%29=93.6, but we cannot be sure of the units for this result. Why? Because we do not know the density of the acid solution, we do not know the identity of the acid, and we do not know if the concentration given is mass per mass or mass per volume or if volume per volume.