Calculate the mass of the following :
(i) 1 atom of sodium
(ii) 10 molecules of argon
(iii) 1 molecule of `CO_2`
(iv) 1 molecule of `H_2SO_4`.

Explanation

To solve the question of calculating the mass of different atoms and molecules, we will follow a systematic approach using the concept of molar mass and Avogadro's number.

### Step-by-Step Solution:

#### (i) Mass of 1 atom of sodium (Na):
1. **Identify the molar mass of sodium (Na)**: The molar mass of sodium is 23 g/mol.
2. **Use Avogadro's number**: Avogadro's number (N_A) is \(6.022 \times 10^{23}\) atoms/mol.
3. **Calculate the mass of one atom**:
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