What is the density of iridium metal? (Ir: 192.2 g/mol; face-centered cubic with 3.83x10^-8 cm edges).

Question

Chemistry

Zaiden Charles

14 January, 07:25

What is the density of iridium metal? (Ir: 192.2 g/mol; face-centered cubic with 3.83x10^-8 cm edges).

+1

Answers (1)

Know the Answer?

Ben Snow · Answer 1

Number of atoms in FCC repeat structure: 5

Mass of one atom of Ir:

192.2 / 6.02 x 10²³

= 1.60 x 10⁻²¹ g

Volume = (3.83 x 10⁻⁸) ³ cm³

density = (1.60 x 10⁻²¹ x 5) / (3.83 x 10⁻⁸) ³

= 28.4 g cm⁻³