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Pennies The mass of a penny is about 3.00 grams, and its diameter is 19.0 mm....

Pennies The mass of a penny is about 3.00 grams, and its diameter is 19.0 mm.

a. What is the mass of a single copper (Cu) atom in atomic mass units (u)?

b. What is the mass of 1 mole of copper atoms in grams (g)?

c. If a penny was solid copper, how many moles of copper would it contain?

d. How many atoms would it contain?

e. In order to begin to understand the magnitude of this number, imagine covering the entire surface area of the earth with pennies. How many pennies would this take? (You may neglect the spaces between pennies.) Does the comparison surprise you?

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