Question

Approximately how many atoms make up 1.02 moles of helium

Answer 1

1 mole=6.022×10^23 atoms
so, 1.02 moles = 6.022×10^23 × 1.02
= 6.14244 ×10^23 atoms

Answer 2

1 mole of He =6.022×10^23 atoms
So 1.02 moles of He = 6.022×10^23×1.02
=6.142×10^23 atoms