EOC_Solution_28_29

# EOC_Solution_28_29 - 28.29 Solve The density of aluminum is...

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28.29. Solve: The density of aluminum is 2700 kg/m 3 , so 1.0 m 3 of aluminum has a mass of 2700 kg. The conduction-electron density is the number of electrons in 1.0 m 3 . Because the atomic mass of aluminum is 27 u, 27 g of aluminum contains N A = 6.02 × 10 23 atoms. Thus, the number of aluminum atoms in 2700 kg of aluminum is 6 02 10 27 6 0 10 23 28 . . × ( ) ( ) = × g 2700 kg
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