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Find the mass of 1 cm3 of copper.

density= mass / volume

mass= density * volume (density is about 8.96 g cm-3)

mass= 8.96 g cm-3 * 1 cm3 = 8.96 g

no. of moles = mass / Molar mass =8.96 g / 63.5 g mol-1 = 0.14 mol

no. of copper atoms in 1 cm3 of copper= 0.14 mol * 6.022 *1023 =8.4 * 1022 atoms

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