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Answer the following chemistry problem. Report the volume to the nearest gallon of carbonic acid.

How many gallons of 60% carbonic acid must be mixed with how many gallons of 80% carbonic acid to make 640 gallons of a 76% carbonic acid solution?


The number of gallons of 60% carbonic acid needed is gallons.
The number of gallons of 80% carbonic acid needed is gallons.