1.

Potassium crystallizes in a body centred cubic lattice. Calculate the number of unit cells in 1 g potassium. Atomic mass of potassium=39 u.

Answer»

SOLUTION :Gram atomic mass of potassium = 39 G
`:.` 39G of potassium contains atoms = `6.023 xx 10^(23)`
1g of potassium contains atoms = `(6.023 xx 10^(23))/(39) = 1.54 xx 10^(22)`
NUMBER of atoms in a body-centred unit cell = 2
`:.` Number of unit cells in 1 g of potassium = `(1.54 xx 10^(22))/(2) = 7.7 xx 10^(21)`


Discussion

No Comment Found

Related InterviewSolutions