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The formula mass of the ionic compound lithium chloride, LiCl is 6.9 + 35.5 = 42.4.Amount of LiCl = 98.2/42.4 = 2.32mol
There are 2.32 moles of formula unit in a 98.2g pure sample of LiCl.
To get the numerical number, multiply the quantity in moles by the Avogadro's constant.
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