A piece of brass (alloy of copper and zinc) weighs 12.9 g in air. When completely immersed in water weighs 11.3 g. what is the mass of copper contained in the alloy? Specific gravities of copper and zinc are 8.9 and 7.1 respectively.

A piece of brass (alloy of copper and zinc) weighs 12.9 g in air. When

1.	A piece of brass (alloy of copper and zinc) weighs 12.9 g in air. When completely immersed in water weighs 11.3 g. what is the mass of copper contained in the alloy? Specific gravities of copper and zinc are 8.9 and 7.1 respectively.
A.	6.7 gm
B.	7.6 gm
C.	4.6 gm
D.	5.6 gm
Answer» C. 4.6 gm

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A piece of brass (alloy of copper and zinc) weighs 12.9 g in air. When completely immersed in water weighs 11.3 g. what is the mass of copper contained in the alloy? Specific gravities of copper and zinc are 8.9 and 7.1 respectively.

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