Answer:
0.3902 moles
Explanation:
Given that, you know that 3 moles of Cl⁻ combines with 1 mole of FeCl₃. First you need to find the number of moles of Cl⁻ is contained in 2.35x10^23 atoms of Cl⁻. To do this you need to divide the number of Cl⁻ atoms by Avogadro's number (6.02x10^23atoms/mol) to get 0.3902 moles of Cl⁻
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