Recall that density d is calculated by:
We need to determine the mass and volume of a unit cell for platinum.
In a face-centered cubic unit cell, there are 4 atoms in 1 unit cell. The atomic mass of platinum is 195.08 g/mol. Recall that there are 6.022 × 1023 atoms in 1 mole. The mass of a unit cell of platinum is:
Platinum crystallizes with the face-centered cubic unit cell. The radius of a platinum atom is 139 pm.
Calculate the density of platinum in g/cm3.
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