The node will change its label depending on what inputs are available in the node. If only Molar Mass is available, it will be labeled “Species Molar Masses”.

Enter a value or expression for the Molar mass Mw for each species. The default value is 0.032 kg/mol, which is the molar mass of O2 gas.

This section is available when the Migration in electric field check box is selected in the Transport Mechanisms section of the interface. Enter the charge number zw (dimensionless, but requires a plus or minus sign) for each species.