Answer :
1 mole of each substance = 6.022 × 10²³
so, 1 mole of He has 6.022 × 10²³ atoms
- 2 moles of He has 2 × 6.022 × 10²³ atoms
- 2 moles of He has 12.044 × 10²³ atoms of He
1 mole of each substance = 6.022 × 10²³
so, 1 mole of He has 6.022 × 10²³ atoms