Answer:
3.43 x 10²⁴atoms
Explanation:
To solve this problem, the mole concept will play a very vital role.
We have been given that:
number of moles = 5.7moles of He;
So;
We know that:
1 mole of any substance contains 6.02 x 10²³ atoms
5.7 moles of He will contain 5.7 x 6.02 x 10²³ atoms = 3.43 x 10²⁴atoms
