Considering that a copper atom has a mass of 1.06 × 10⁻²² g and a penny has a mass of 2.5 g, 1 mole of copper atoms has a mass of 63.8 g and 0.039 moles of copper have a mass equal to the mass of a penny.
A copper atom has a mass of 1.06 × 10⁻²² g. Considering 1 mole contains 6.02 × 10²³ atoms (Avogadro's number), the mass of 1 mole of copper atoms is:
[tex]6.02 \times 10^{23} atoms \times \frac{1.06 \times 10^{-22}g}{1atom} = 63.8 g[/tex]
A penny has a mass of 2.5 g. If each mole of atoms of copper has a mass of 63.8 g, the moles of copper atoms that have a mass equal to the mass of a penny are:
[tex]2.5 g \times \frac{1mol}{63.8g} = 0.039 mol[/tex]
Considering that a copper atom has a mass of 1.06 × 10⁻²² g and a penny has a mass of 2.5 g, 1 mole of copper atoms has a mass of 63.8 g and 0.039 moles of copper have a mass equal to the mass of a penny.
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