Name the following compounds according to the IUPAC system of nomenclature:
i. `CH_(3)CH(CH_(3))CH_(2)CH_(2)CHO`
ii. `CH_(3)CH_(2)COCH(C_(2)H_(5))CH_(2)CH_(2)Cl`
iii. `CH_(3)CH=CHCHO`
iv. `CH_(3)COCH_(2)COCH_(3)`
v. `CH_(3)CH(CH_(3))CH_(2)C(CH_(3))_(2)COCH_(3)`
vi. `(CH_(3))_(3)C CH_(2)COOH`
vii. `OHC C_(6)H_(4)CHO-p`

Explanation

To name the given compounds according to the IUPAC system of nomenclature, we will analyze each compound step by step.

### Step-by-Step Solution:

**i. CH₃CH(CH₃)CH₂CH₂CHO**
1. Identify the longest carbon chain that includes the functional group (aldehyde, -CHO).
2. The longest chain has 5 carbons (pentanal).
3. Number the carbon chain from the end nearest to the aldehyde group, which gives us the following numbering:
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