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Answer the following chemistry problem. Report the volume to the nearest dram of sulfuric acid.

How many drams of 80% sulfuric acid must be mixed with how many drams of 60% sulfuric acid to make 520 drams of a 66% sulfuric acid solution?

The number of drams of 80% sulfuric acid needed is drams.

The number of drams of 60% sulfuric acid needed is drams.