QuestionA copper atom weighs $1.06 \times 10^{-22} \mathrm{~g}$; a penny weighs $2.5 \mathrm{~g}$. Find the mass of 1 mole of copper and how many moles equal a penny's mass.

Studdy Solution
Calculate the number of moles of copper atoms.
$$Number\, of\, moles\, of\, copper\, atoms =2.5 \mathrm{~g} /63. \mathrm{~g/mole} =0.039 \mathrm{~moles}$$The mass of1 mole of copper atoms is63. g/mole and the number of moles of copper atoms that have a mass equal to the mass of a penny is0.039 moles.