Question

How do you calculate the number of atoms from a given mass of an element?


For example: How many atoms are in a sample of Lead that weighs 33.12 grams?

Please explain & show your work!!? (: Thanks!

Answer 1

1. Find the no of mole of lead by \[\text{no. of mole} = \frac{\text{mass}}{\text{molar mass}}\]
2. Find the no. of atoms by multiplying the no. of moles you found by Avogadro's constant