There are four amides with the formula `C_(3) H_(7) NO`.
Write their structures.
Identify the amide which has lower melting point and boiling point than the other three.

Explanation

To solve the question of identifying the four amides with the formula C₃H₇NO and determining which one has the lowest melting and boiling points, we can follow these steps:

### Step 1: Identify the General Structure of Amides
Amides have the general structure R-C(=O)-NR'R'', where R, R', and R'' are hydrocarbon groups or hydrogen atoms. For our case, we need to ensure that the total number of carbons (C), hydrogens (H), nitrogen (N), and oxygen (O) matches the formula C₃H₇NO.

### Step 2: Determine Possible Structures
Given the formula C₃H₇NO, we can derive four different amide structures.

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