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:
brainly.com/question/15488332
#SPJ4
