The molar mass of an element is the mass of one mole of that element. For tin (Sn), the molar mass is approximately 118.71 g/mol.
This value is derived from the atomic weight of tin, which is the average mass of all the isotopes of tin found in nature. The atomic weight of tin is 118.71, and since the molar mass is numerically equal to the atomic weight, the molar mass of tin is also 118.71 g/mol.
To calculate the molar mass of a compound containing tin, you would sum the molar masses of all the atoms in the compound. However, for pure tin, the molar mass is simply the atomic weight of tin.