The number of formula units of calcium fluoride Caf, present
in 146.4 g of Caf, (The molar mass of Caf, is 78.08 g/mol)
(a) 1.129x10 Caf,
(c) 7808x10% CAF
(b) 1.146x 10 Cafe
(d) 1877x10 Car
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