Answer :
The number of formula units is determined by the product of the moles and Avogadro number. 6.2 gm lithium sulfate has 0.301 x 10²³ particles.
What is the number of formula units?
The number of formula units is used to give the number of particles like the atoms and the molecules in a substance. It is given by the moles of the substance and Avogadro's number (Nₐ), 6.02 x 10²³.
Given,
Mass of lithium sulfate = 6.2 grams
The molar mass of lithium sulfate = 109.94 grams per mole
Moles are calculated as:
Moles (n) = mass ÷ molar mass
n = 6.2 ÷ 109.94
n = 0.05 moles
If 1 mole = 6.02 x 10²³
Then, 0.05 moles = 0.301 x 10²³
Therefore, 6.2 gm of lithium sulfate contains 0.301 x 10²³ atomic particles.
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