Question

How many atoms of carbon (C,12.01 g/mol) are in a diamond with a mass of 0.568 g?

Answer 1

2.85 × 10^22. A diamond with a mass of 0.568 g contains

2.85 × 10^22 atoms C.

Diamond is a form of pure carbon.

a) Convert grams of C to moles of C

Moles of C = 0.568 g C × (1 mol C/12.01 g C) = 0.047 29 mol C

b) Convert moles of C to atoms of C

Atoms of C = 0.047 29 mol C × (6.022 × 10^23 atoms C)/(1 mol C)

= 2.85 × 10^22 atoms C