Classify the following into electrophilies and nucleophiles:
(a) `H^(+)` , (b) `NH_(3)`
(c) `AlCl_(3)` , (d) `NO_(2)^(+)`
(e) `CN^(-)` , (f) `H_(2)O`
(g) ROH , (h) `H_(2)O`
(i) Carbocation.

Explanation

To classify the given species into electrophiles and nucleophiles, we need to understand the definitions of both terms:

- **Electrophiles** are species that are electron-deficient and seek to gain electrons. They typically have a positive charge or a partial positive charge.
- **Nucleophiles** are species that are electron-rich and can donate electrons. They typically have a negative charge or possess lone pairs of electrons.

Now, let's classify the given species step by step:

### Step 1: Classify `H^(+)`
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