Calculate each of the following quantities:

1 answer:

5 0

The number of moles in 78.9 g of sodium perchlorate is 0.644 moles and 3.876 x 10²³ formula units are particles.

<h3>What are formula units?</h3>

Moles are converted to formula units by multiplying them by 6.02 x 1023, or Avogadro's number (Na). The moles and masses of tiny particles are estimated using this method.

Given that the mass of sodium perchlorate is 78.9 g

The molar mass of sodium perchlorate is 122.44 g/mol

Moles of sodium perchlorate will be

Moles (n) = mass ÷ molar mass

n = 78.9 g ÷ 122.44

n = 0.644 moles

If 1 mole = 6.02 x 10²³

Then, 0.644 moles = 3.876 x 10²³ particles

Thus, there are 0.644 moles of sodium perchlorate in 78.9 g.

Learn more about formula units, here:

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The answer to your question is given below.

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**** Please see attached photo for further details.