A simulated infrared absorption spectrum of a gas-phase organic compound is shown in the following figure. Use the characteristic group frequencies listed in Section 19.5 to decide whether this compound is more likely to be Cl₂CO, (CH₃)₂CO, CH₃OH, CH₃COOH, CH₃CN, CCl₄, or C₃H₈. Explain your reasoning.

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500 1000 1500 2000 4000 2500 3000 3500 Frequency/cm-1 Absorption intensity