- #1
daviddee305
- 16
- 0
1. Calculate the density of Na metal. The length of the body-centered cubic unit cell is 4.24 Å.2. Attempted solution:
[4 Na Atoms/unit cell] * [1 mol Na atoms/(6.022*10^23 atoms)] * [22.99g Na/1 mol Na] = 1.527 * 10-22 g/unit cell
(4.24 Å)3 = 7.6225 * 10-23 cm3/unit cell[1.527 * 10-22 g/unit cell] / [7.6225 * 10-23 cm3/unit cell] = 2.00 g/cm3The correct answer is 1.00 g/cm3... What went wrong in my calculations?
[4 Na Atoms/unit cell] * [1 mol Na atoms/(6.022*10^23 atoms)] * [22.99g Na/1 mol Na] = 1.527 * 10-22 g/unit cell
(4.24 Å)3 = 7.6225 * 10-23 cm3/unit cell[1.527 * 10-22 g/unit cell] / [7.6225 * 10-23 cm3/unit cell] = 2.00 g/cm3The correct answer is 1.00 g/cm3... What went wrong in my calculations?