3.00097 x 
atoms are contained in 100.0 g of mercury.
<h3>What is moles?</h3>
The mole is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 12 g of carbon-12.”
Number of moles of mercury = 
Number of moles of mercury = 
= 0.4985 moles
Number of moles of mercury = Number of atoms = moles of Hg x 
= 0.4985 x
= 3.00097 x atoms.
Hence, 3.00097 x atoms are contained in 100.0 g of mercury.
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