How many $CaF_2$ formula units are present in $146.4 \ g$ of $CaF_2$? (Molar mass of $CaF_2 = 78.08 \ g/mol$)
- A$1.129 \times 10^{24} \ CaF_2$
- B$1.146 \times 10^{24} \ CaF_2$
- C$7.808 \times 10^{24} \ CaF_2$
- D$1.877 \times 10^{24} \ CaF_2$
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