Answer:
1.04x10^25 atoms
Explanation:
1 mole of any substance contains 6.02x10^23 atoms by Avogadro's hypothesis. This means that 1mole of Hg will also contain 6.02x10^23 atoms
If 1 mole of Hg = 6.02x10^23 atoms
Therefore, 17.3moles of Hg = 17.3x6.02x10^23 = 1.04x10^25 atoms