Mr(CrCl3) = 52 + 35,5×3 = 158,5
Mr(K2Cr2O7) = 39×2 + 52×2 + 16×7 = 294
Mr(Cr2O3) = 52×2 + 16×3 = 152
Mr(CrCl2) = 52 + 35,5×2 = 123
Mr(CrCl3) = 52 + 35,5×3 = 158,5
Mr(K2Cr2O7) = 39×2 + 52×2 + 16×7 = 294
Mr(Cr2O3) = 52×2 + 16×3 = 152
Mr(CrCl2) = 52 + 35,5×2 = 123