When I try to obtain the MolarMass of aniline I obtain 4 different results.
manilina = ChemicalData["aniline", "MolarMass"]
{Quantity[93.1265, ("Grams")/("Moles")],
Quantity[94.1191, ("Grams")/("Moles")],
Quantity[94.1199, ("Grams")/("Moles")],
Quantity[99.0824, ("Grams")/("Moles")]}
How to select the correct value for further calculations