Resumen de Correctly Expressing Atomic Weights

Moreno Paolini, Giovanni Cercignani, Carlo Bauer

• While agreeing with the reasoning expressed in the letter by George Gorin, we would like to underline the following points. His starting point is that "the numbers in question" are to be multiplied by 1 g/mol in order to obtain the molar mass or mass of a mole, and by 1 dalton/molecule to obtain the mass (in daltons) of a molecule: it is clear that the "numbers in question" are the molecular weights expressed as pure numbers. By contrast, we discussed the possibility of expressing molecular weights either by pure numbers, or by the dalton unit (according to a more general way of expressing quantities).