Question

The molecular weight of a compound is typically indicated by the heaviest peak on a mass spectrum, which i presumed to correspond to the molecular ion (M*). For smaller compounds, the heaviest peak tends to also be the most intense peak. The lighter peaks in the spectrum result from fragmentation of the molecule into smaller ions. Since peak intensity correlates to the relative stability of the ions produced, the peaks of the ionized fragments can be more intense than the molecular ion peak when the molecule is sufficiently large which is why we presume the heaviest peak to represent the molecule. Smaller peaks that occur 1 mass unit away from larger peaks are predominantly due to the natural occurrence of isotopes (e.g., carbon-13). Combustion analysis of 150.0 mg of 1,2,3-benzenetriol, a compound composed of carbon, hydrogen, and oxygen, gives 64.3 mg of H2 O and 314.2 mg of CO2. (Figure 1) Significant Figures Feedback: Your answer 126 amu was either rounded differently or used a different number of significant figures than required for this part Figure 1 of 1 Part C 100 Give the molecular formula. 80 Express your answer as a chemical formula. e 60 20 Submit 40 120 160 80 Mass Provide Feedback Next

Answer 1