Mr(Fe₂0₃) = 2 * 56 + 3 * 16 = 160
Mr(MgO) = 1 * 24 + 1 * 16 = 40
Mr(AgNO₃) = 1 * 108 + 1 * 14 + 3 * 16 = 170
Mr(C₆H₁₂O₆) = 6 * 12 + 12 * 1 + 6 * 16 = 180
Mr(Fe₂0₃) = 2 * 56 + 3 * 16 = 160
Mr(MgO) = 1 * 24 + 1 * 16 = 40
Mr(AgNO₃) = 1 * 108 + 1 * 14 + 3 * 16 = 170
Mr(C₆H₁₂O₆) = 6 * 12 + 12 * 1 + 6 * 16 = 180