The alloy consists of 5 parts copper and 3 parts zinc. What is the mass of copper and what is the mass
| April 30, 2021 | education
The alloy consists of 5 parts copper and 3 parts zinc. What is the mass of copper and what is the mass of zinc in 2.72 kg of alloy?
For the convenience of calculations, let’s convert a decimal fraction to an ordinary one: 2.72 = 272/100 = 68/25.
There are 3 steps in solving this problem:
1). 5 + 3 = 8 (parts) – the alloy conditionally consists.
2). 68/25 * 5/8 = 340/200 = 17/10 = 1.7 (kg) – the mass of copper in the alloy.
3). 68/25 * 3/8 = 204/200 = 102/100 = 1.02 (kg) – the mass of zinc in the alloy.
Answer: 1.7 kg is the mass of copper in the alloy, 1.02 kg is the mass of zinc in the alloy.
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