Answer to Question #228394 in General Chemistry for vhinz

Question

An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 0.286 nm, and the density of the crystal is 7.92 g/cm3 . Calculate the atomic weight of the element.

Answer 1

The atom weighs 1.85 x 10^-²² g.

Explanation:

So, 0.286 nm = 2.86 x 10^-⁸ cm.

Also, to get the volume, we have (2.86 x 10^-⁸ cm)³ = 2.3393 x 10^-²³ cm³.

Multiply it by 7.92 g/cm³ to get the mass in grams. So, we have, 1.85 x 10^-²² g.