How many Fe(II) ions are there in 20.0 g of FeSO4?
A) 2) 19 × 10- 25 iron(II) ions
B) 7) 92 × 1022 iron(II) ions
C) 4) 57 × 1024 iron(II) ions
D) 1) 82 × 1027 iron(II) ions
Correct Answer:
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