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

2.85 x 10^22. There are 2.85 x 10^22 atoms of carbon in a diamond with a mass of 0.568 g.

(a)Use the molar mass of C to convert grams of C to moles of C

0.568 g C x (1 mol C/12.01 g C) = 0.047 30 mol C

(b) Use Avogadro’s number to convert moles of C to atoms of C

0.047 30 mol C x (6.022 x 10^23 atoms C/1 mol C) = 2.85 x 10^22 atoms C