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How many atoms are in 2.32g Hg

Sagot :

Taking into account the definition of Avogadro's Number, 6.9661×10²¹ atoms are in 2.32 g of Hg.

Avogadro's Number

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.

Definition of molar mass

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.

Number of atoms in 2.32 g of Hg

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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