Question

A dot containing 1 microgram wheight calculate the number of carbon atoms used to make the dot

Answer 1

I microgram means 1 x 10>-6 gm

Now 12 gm carbon = 6.023 x 10>23 atoms

1 x 10> -6 gm = 6.023 x 10>23 / 12 x 1 x 10> -6

= 5.019 x 10 >16