Please help me with this problem and explain if you can as to how you arrived at

Question

Please help me with this problem and explain if you can as to how you arrived at the answer --- I don't even know where to begin. Thank you in advance for any help.

Part A The following liquids have about the same molar mass. The vapor pressure of each was measured in the open-ended manometer shown below. SU Arrange the liquids in order of decreasing height of the mercury column, designated as h in the image. Rank from largest to smallest height of the mercury column, h. To rank items as equivalent, overlap them CH CH CH CHCH CH CH2CH CH OCH CH CH2CH CH2CH,CH CH CH CH CH2CH NH NH2

Explanation / Answer

The higher the vapor pressure, the higher the pressure in the bulb on the left and the larger the value for "h". The higher the vapor pressure the lower will be the normal boiling point.

Largest height to smallest is listed as below:

1)CH3CH2CH2CH2CH2CH3

2) CH3CH2CH2CH2OCH3

3) CH3CH2CH2CH(NH2)CH3

4) CH3CH2CH2CH2CH2-NH2

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