A student records the following data for samples of a pure metal.
n (mol): 0.100 0.200 0.300 0.400
m (g): 5.42 10.79 15.10 21.66
One of the mass measurements is suspected to be erroneous. Using only the data points that are consistent with each other, determine the molar mass of the metal to three significant figures, in g mol⁻¹.