Mr (NaCl*KCl) = 23 + 35 + 39 + 35 = 132
Mr (BaCl*2H2O) = 137 + 35*2 + 2 * 18 = 243
Mr (CuSO4*5H2O) = 64 + 32 + 64 + 5 * 18 = 250
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Mr (NaCl*KCl) = 23 + 35 + 39 + 35 = 132
Mr (BaCl*2H2O) = 137 + 35*2 + 2 * 18 = 243
Mr (CuSO4*5H2O) = 64 + 32 + 64 + 5 * 18 = 250