The molar mass of gold (Au) is approximately 197.00 grams per mole.
Explanation: The molar mass is the mass of one mole of a substance, and for gold, this value is derived from its atomic weight found on the periodic table. The atomic weight of gold is about 197 atomic mass units (amu), which translates directly to 197 grams per mole since the amu is defined such that 1 amu equals 1 gram per mole. Therefore, when calculating the molar mass of gold, we round it to two decimal places and conclude that it is 197.00 g/mol.