93.54% of zinc in the penny when a penny has a total mass of 3.1 grams and zinc makes up 2.9 g of the penny.
What is mass?
Mass is simply the measure of the amount of matter in a body.
Divide the mass of the zinc by the total mass of the penny.
[tex]\frac{Mass \;of \;zinc}{Total \;mass}[/tex]
[tex]\frac{2.9}{3.1}[/tex]
=0.9354
To get to a percent, multiply by 100.
0.9354 x 100 = 93.54
Thus, the mass of the zinc in the penny is 93.54%.
Learn more about mass here:
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