write the systematic name of each organic molecule:

Explanation:

Step1: Identify the longest carbon - chain with the aldehyde group

For the first molecule, the longest chain with the aldehyde group has 4 carbons. There is a methyl group at C - 3 and a hydroxyl group at C - 3. The aldehyde group is at C - 1.

Step2: Name the molecule

The name is 3 - methyl - 3 - hydroxybutanal.

Step3: For the second molecule

The longest chain with the aldehyde group has 4 carbons. There is an isopropyl group at C - 2 and a hydroxyl group at C - 2. The aldehyde group is at C - 1.

Step4: Name the second molecule

The name is 2 - isopropyl - 2 - hydroxybutanal.

Step5: For the third molecule

The longest chain with the aldehyde group has 4 carbons. The aldehyde group is at C - 1.

Step6: Name the third molecule

The name is butanal.

Answer:

1. 3 - methyl - 3 - hydroxybutanal
2. 2 - isopropyl - 2 - hydroxybutanal
3. butanal