Mr(HNO3) = 1 + 14 + 3×16 = 63
Mr(Fe2O3) = 56×2 + 16×3 = 160
Mr(HCl) = 1 + 35,5 = 36,5
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Mr(HNO3) = 1 + 14 + 3×16 = 63
Mr(Fe2O3) = 56×2 + 16×3 = 160
Mr(HCl) = 1 + 35,5 = 36,5