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Brass is an ally of Cu and Zn. A sample ...

Brass is an ally of Cu and Zn. A sample of brass weighing 5.793 g when treated with excess of dil `H_2SO_4` gives 324 " mL of " dry `H_2` at `20^@C` and 750 mm pressure. What is the percentage of Cu by weight in the alloy.

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