Argon crystallizes in the face-centered cubic arrangement at 40k. given that the atomic radius of argon is 191 pm, calculate the

Question

Harrizon [31]

3 years ago

10

Argon crystallizes in the face-centered cubic arrangement at 40k. given that the atomic radius of argon is 191 pm, calculate the

density of solid argon.

Chemistry

1 answer:

kolezko [41] · Answer 1 · 2022-03-22T07:24:22+03:00

Molecular weight of 1 mole of Argon = 39.948 g
for face-centered cube = x = (√8)r and here r = 191 pm
so, x = √8 x 191 = 540 pm = 540 x 10<span>^-10 cm
</span>density = (39.948g / mol) x (unit cell / 540x10^-10 cm)^3 x (mol / 6.022x10^23 atoms) x (4 atoms / unit cell) = 1.69g/cm^3
so density of solid argon is 1.69g/cm^3