Chemistry

Rank the following in order of decreasing vapor pressure, and briefly explain the observed trend in vapor pressure:
Acetic Acid
Isobutane
Acetamide
Propanal

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  1. I think the order of decreasing vapor pressure is Acetamide, Acetic Acid, Propanal, and Isobutane. The trend is the higher the boiling point, the lower the vapor pressure.

    Is this right? If not, please explain.

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