A piece of copper-tin alloy contains 45% copper. What is the mass of a piece if it contains 90
| September 26, 2021 | education
A piece of copper-tin alloy contains 45% copper. What is the mass of a piece if it contains 90 grams of copper? How many grams of tin are in a piece?
The mass of copper in a piece of alloy is 90g, which is 45%.
1) If the entire alloy is 100%, and the mass of the entire piece is X, then we get the following equation:
45/90 = 100 / x
45x = 90 * 100
45x = 9000
x = 9000/45
x = 200
200 g – weight of the entire alloy
2) Now we find the mass of tin in the piece:
200 – 90 = 110 g
Answer: the mass of the piece is 200 g, the mass of tin in the alloy is 110 g.
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