Final answer:
The molar mass of a cation can be calculated using the molar mass of the compound it belongs to.
Step-by-step explanation:
The molar mass of a cation can be calculated using the molar mass of the compound it belongs to. The molar mass is the mass in grams of one mole of the compound. To calculate the molar mass of the cation, you need to know the molar mass of the compound and the ratio of the cation to the compound.
For example, if the molar mass of the compound is 176.124 g/mol and the cation has a 1:1 ratio with the compound, then the molar mass of the cation would also be 176.124 g/mol.