J.R. S. answered 10/23/20
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A) 8.46x1027 molecules x 14 atoms / molecule = answer in atoms
B) 5.236x1020 formula units PbCl4 x 1 mol PbCl4/6.02x1023 formula units x 5 moles ions/mole PbCl4 = answer in moles of ions