Mr(KCl) = 39 + 35.5 = 74.5
Mr(FeCl3) = 56 + 35.5 * 3 = 162.5
Mr(MnCl4) = 55 + 35.5 * 4 = 197
Mr(CrCl3) = 52 + 35.5 * 3 = 158.5
Mr(CaCl2) = 40 + 35.5 * 2 = 111
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Answers & Comments
Mr(KCl) = 39 + 35.5 = 74.5
Mr(FeCl3) = 56 + 35.5 * 3 = 162.5
Mr(MnCl4) = 55 + 35.5 * 4 = 197
Mr(CrCl3) = 52 + 35.5 * 3 = 158.5
Mr(CaCl2) = 40 + 35.5 * 2 = 111