Diamond is a natural form of pure carbon. What number of atoms of carbon are in a 1.00-carat diamond (1.00 carat = 0.200 g) ?

1.004*10²²

Explanation:

The molar mass of carbon is 12 g/mol

which means that:

1 mole of carbon atoms has a mass of 12 grams.

Since, diamond is a allotrope of carbon.

Mass of 1.00-carat diamond in grams is:

1.00 carat = 0.200 g

Since, 1 mole of C contains 6.022*10²³ atoms of C

So,

12 grams contains 6.022*10²³ atoms of C

1 gram contains 6.022*10²³ / 12 atoms of C

0.200 gram contains (6.022*10²³ / 12) * 0.200 atoms of C

Thus,

1 carat diamond contains 1.004*10²² atoms of C.