Question

A single atom of platinum has a mass of 3.25 x 10^-22 g. What is the mass of 6.0 x 10^23 platinum atoms?

Answer 1

The answer is 1.95 × 10² g

1 atom = 3.25 × 10⁻²² g
6.0 × 10²³ atoms = x g

1 atom : 3.25 × 10⁻²² g = 6.0 × 10²³ atom : x
x = 3.25 × 10⁻²² g × 6.0 × 10²³ atom : 1 atom
x = 3.25 × 6 × 10²³⁻²² g
x = 19.5 × 10 g
x = 1.95 × 10 × 10 g
x = 1.95 × 10² g

Answer 2

3.25 x 10^-22 g/atom times 6.0 x 10^23 atoms/mole = the answer you seek