How many atoms are in 0.065 moles of Hg

3.913x10^22 atoms

Explanation:

We have come to discover that 1 mole of any substance contains 6.02x10^23 atoms as explained by Avogadro's hypothesis.

This means that 1 mole of Hg contains 6.02x10^23 atoms.

Therefore, 0.065 moles of Hg will contain = 0.065 x 6.02x10^23 = 3.913x10^22 atoms