Question

an alloy contains 42/ of copper and the rest in zinc . what is the weight of copper in 6.3 kg of the alloy?

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Answer 1

Answer:

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Step-by-step explanation:

Let percentage of zinc = x

Copper = 30%

Nickel = 42%

30 +42 + x = 100%

72 + x = 100%

x= 100-72

X= 28%.

Mass of zinc = % of zinc * mass of alloy

= 28/100 * 1

= 0.28 kg.

Answer 2

an alloy contains 42/ of copper and the rest in zinc . what is the weight of copper in 6.3 kg of the alloy?

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