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kiz2006 kiz2006
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11 years ago
a penny weighs 2.507 g and is made of an alloy which is 97.6% zinc and 2.4%copper. what is the mass of each element in the penny?
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#1
Educator
11 years ago
To find the mass of zinc:

0.976 x 2.507 = Answer

To find the mass of copper:

0.024 x 2.507 = Answer
wrote...
#2
11 years ago
Zinc Rightwards Arrow 2.507g x 0.976 = 2.447g Zn

Copper Rightwards Arrow 2.507g x 0.024 = 0.0602g Cu

Rounded to 4 significant figures
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