Which of these substances has the highest relative molecular weight? What is it equal to? O2; H2O; CO2; H2; C12H12O11

The relative molecular weights of substances must be calculated using the periodic system of D.I.Mendeleev:
Mr (O2) = Ar (O) * N (O) = 16 * 2 = 32;
Mr (H2O) = Ar (H) * N (H) + Ar (O) * N (O) = 1 * 2 + 16 * 1 = 18;
Mr (CO2) = Ar (C) * N (C) + Ar (O) * N (O) = 12 * 1 + 16 * 2 = 44;
Mr (H2) = Ar (H) * N (H) = 1 * 2 = 2;
Mr (C12H12O11) = Ar (C) * N (C) + Ar (H) * N (H) + Ar (O) * N (O) = 12 * 12 + 1 * 12 + 16 * 11 = 332.
Answer: The substance C12H12O11 has the highest relative molecular weight, which is 332.