An element crystallizes in a face-centered cubic lattice. If the length of an edge of the unit cell is 0.408 nm, and the density of the element is 19.3 g/cm3 , what is the identity of the element?

Au

Explanation:

For the density of a face-centered cubic:

where

= molar mass of the compound

avogadro's constant

the volume of a unit cell

Given that:

Density = 19.30 g/cm³

a = 0.408 nm

a =

a =

∴

Thus, the molar mass of 197.37 g/mol element is Gold (Au).

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.