QuestionA copper atom weighs $1.06 \times 10^{-22} \mathrm{~g}$, and a penny weighs $2.5 \mathrm{~g}$. Find moles of copper in a penny.

Studdy Solution
Calculate the number of moles in a penny.
$$Number\, of\, moles = \frac{2. \mathrm{~g}}{63.83 \mathrm{~g}} =0.039 \mathrm{~moles}$$The number of moles of copper atoms that have a mass equal to the mass of a penny is0.039 moles.