# chemistry

1)The element nickel has ccp packing with a face-centered cubic unit cell. The density of nickel is 8900 kg/m3 and the cell volume is 4.376 x 10-23 cm3. Calculate the value of Avogadro's number to three significant figures based on these data. (Note: the value may differ from the tabular value).

2)The density of aluminum is 2.7 g/mL and the cell volume is 6.64 x 10-29 m3. Determine the number of atoms in the unit cell. Note: the number of atoms in a unit cell is a whole number.

1. sorry for double posting, i forgot to include number 2

posted by blasting
2. Now that you see how to solve for N and how I worked the problem, you should be able to do part 2 yourself. Post your work if you get stuck.

posted by DrBob222

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