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If 10.5 gm of an alloy of copper and zinc contains 2.1 gm of zinc , find the weight of the copper in 42 gm of the alloy.The answer is given - 33.6 gm.please give step by step explanation because i need to write in school copy. Please help if you know this is Unitary Method chapter.​

Answer»

ALLOY 10.5

ZINC 2.1

COPPER = 8.4 gm.

if 10.5 gm alloy then copper is 8.4 gm

if 1 gm alloy then copper is 8.4/10.5

if 42 gm alloy then copper is 33.6gm.



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