Final answer:
Without the mass spectrum data, we cannot determine the molar mass of the substance; however, molar mass is the mass of one mole of a substance, which is equivalent to 6.022 x 10^23 molecules of that substance.
Step-by-step explanation:
The question "Based on the mass spectrum shown, what is the approximate molar mass of the substance?" requires the identification of the molar mass based on the mass spectrum provided. The molar mass (M) is the mass of 1 mole of a substance, usually measured in grams per mole or g/mol. The four options provided for the molar mass are (a) 50 g/mol, (b) 75 g/mol, (c) 100 g/mol, and (d) 125 g/mol. Without the actual mass spectrum to visually examine, we cannot definitively answer this question. However, the concept that a molar mass is the mass of 6.022 × 1023 molecules is vital to understanding how a mass spectrum might give us the molar mass of a compound.