Question

Calculate the average mass in grams of one platinum atom

Answer 1

Answer: 3.24 x 10⁻²² g Pt

Step-by-step explanation:

This is a unit conversion problem, so we will convert from 1 atom Pt to mol Pt to g Pt, using Avogadro's constant (6.022 x 10²³ atoms/1 mol) and the molecular weight of platinum (195.1g Pt/1 mol Pt).

I wrote it 2 different ways just in case the fractions are a bit difficult to read. :)

1 Pt atom (
`(1 mol Pt)/(6.022 * 10^(23) atoms Pt)`)(
`(195.1g Pt)/(1 mol Pt)`) = 3.24 x 10⁻²² g Pt

1 Pt atom (1 mol Pt/6.022 * 10²³ atoms Pt)(195.1g Pt/1 mol Pt) = 3.24 x 10⁻²² g Pt

I hope this helps! :)