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Answer :
The composition of the alloy for Copper ;Zinc ; Lead is 87.6%; 10.7%; 1.7%
Composition refers to the chemical elements or molecules that make up a substance. The composition of a substance can be determined by analyzing its chemical structure, through chemical tests, or by using spectroscopic techniques such as spectrophotometry.
The composition of a particular alloy depends on its intended use.The composition of the alloy can be calculated using the following equation:
Atomic % Copper =[tex](\frac{99.7 lbm Copper }{(99.7 lbm Copper + 102 lbm Zinc + 2.1 lbm Lead)}) * 100[/tex]
Atomic % Zinc =[tex](\frac{102 lbm Zinc }{ (99.7 lbm Copper + 102 lbm Zinc + 2.1 lbm Lead)}) * 100[/tex]
Atomic % Lead = [tex](\frac{2.1 lbm Lead }{(99.7 lbm Copper + 102 lbm Zinc + 2.1 lbm Lead)}) * 100[/tex]
Therefore, the composition of the alloy is:
Atomic % Copper = 87.6%
Atomic % Zinc = 10.7%
Atomic % Lead = 1.7%
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Final answer:
The composition of the alloy in atom percent is approximately 64.0% copper, 35.7% zinc, and 0.27% lead.
Explanation:
To determine the composition of the alloy in atom percent, we need to calculate the mole fraction of each element. First, we convert the weight of each element to moles using their molar masses: 99.7 lbm copper = 2.80 mol, 102 lbm zinc = 1.56 mol, 2.1 lbm lead = 0.0116 mol. Next, we calculate the total moles in the alloy: 2.80 + 1.56 + 0.0116 = 4.37 mol. Finally, we can calculate the atom percent of each element: copper = (2.80/4.37) x 100%, zinc = (1.56/4.37) x 100%, lead = (0.0116/4.37) x 100%. Therefore, the composition of the alloy in atom percent is approximately: 64.0% copper, 35.7% zinc, and 0.27% lead.
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