The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule; e.g., potassium permanganate (KMnO4) in acid solution, 158.038/5 g; potassium...
You can use the ideal gas law to compute the molecular weight of a gas. Since n, the number of moles, is just equal to the mass m divided by the molecular weight M, we can substitute in the m/M for n...