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To find the number of copper atoms in a 94.5 g sample, first determine the molar mass of copper, which is approximately 63.55 g/mol. Using the formula ( \text{moles} = \frac{\text{mass}}{\text{molar mass}} ), we can calculate the moles of copper: ( \frac{94.5 , \text{g}}{63.55 , \text{g/mol}} \approx 1.49 , \text{moles} ). Since one mole contains Avogadro's number of atoms ((6.022 \times 10^{23}) atoms/mole), the total number of copper atoms is ( 1.49 , \text{moles} \times 6.022 \times 10^{23} , \text{atoms/mole} \approx 8.96 \times 10^{23} ) atoms.

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2mo ago

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