Question

Using your density calculations, what is the percent composition of copper in the penny? Density of...

Using your density calculations, what is the percent composition of copper in the penny?

Density of copper = 8.96 g/mL

Density of zinc = 7.13 g/mL

Density of penny = 2.5728 g/mL

Homework Answers

Answer #1

if x is the percentage of copper presenting in the penny

then 1-x percentage zince presenting in penny

so total density of penny = density of copper* percentage of copper + density of zinc*percentage of zinc in penny

2.5728 g/ml = (8.96 g/mL*x)+(7.13 g/ml*(1-x))

x = -2.49 , percentage compostion is coming in negatives that means density of the penny given is wrong or not in the range it would be around 8 g/ml not 2.5728 g/ml .

please check density and substitute in place of density of penny you will get correct answer.

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