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How many moles are in a 7.30 cm X 7.30 cm X 7.30 cm cube of copper?
Wiki User
โ 11y ago
The dimensions given for the copper cube make it 7.303 cubic centimeters in volume. To the justified number of significant digits, 7.303 is 389 cm3. The density of copper is given as 8.96 g/cm3 at 20C. Therefore, at that temperature, the mass of the cube would be grams. The gram molar mass of copper is the same as its gram Atomic Mass, 63.546, and the cube thus contains (3.49 X 104 )/63.456 or 54.9 moles, to the justified number of significant digits.
Wiki User
โ 11y ago
Wiki User
โ 15y ago1 mole Cu = 29g 1 cm³ Cu = 8.96g 8.96g / 29g = 3.2366 1 cm³ Cu = 3.2366 moles
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