Question

Calculate the mass in AMU of a sample that contains 25 potassium atoms

Answer 1

1.52x10^-21 grams/atom K

Step-by-step explanation:

The molar mass of potassium (K) is 39.1 g/mole. One mole = 6.02x10^23 atoms of K.

(25 K atoms)*(39 g/mole)(1 mole/6.023x10^23 atoms) = 1.52x10^-21 grams/atom K