Taking into account the definition of Avogadro's Number, 6.9661×10²¹ atoms are in 2.32 g of Hg.
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
In first place, you can apply the following rule of three, knowing that the molar mass of Hg is 200.59 g/mole: If by definition of molar mass 200.59 g is contained in 1 mole, 2.32 g is contained in how many moles?
[tex]amount of moles=\frac{2.32 gramsx1 mole}{200.59 grams}[/tex]
amount of moles= 0.01156 moles
Now you can apply the following rule of three: if 1 mole contains 6.023×10²³ atoms. 0.01156 moles contains how many atoms?
[tex]amount of atoms=\frac{0.01156 molesx6.023x10^{23}atoms }{1 mole}[/tex]
amount of atoms= 6.9661×10²¹ atoms
Finally, 6.9661×10²¹ atoms are in 2.32 g of Hg.
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