Calculate percentage of sulphur in sulphuric acid `(H_(2)SO_(4))`.

Answer

To calculate the percentage of sulfur in sulfuric acid (H₂SO₄), follow these steps:

### Step 1: Calculate the Molecular Mass of H₂SO₄
- **Hydrogen (H)**: There are 2 hydrogen atoms, and the atomic mass of hydrogen is approximately 1 g/mol.
\[ \text{Mass of H} = 2 \times 1 = 2 \text{ g/mol} \]

- **Sulfur (S)**: There is 1 sulfur atom, and the atomic mass of sulfur is approximately 32 g/mol.
\[ \text{Mass of S} = 1 \times 32 = 32 \text{ g/mol} \]

- **Oxygen (O)**: There are 4 oxygen atoms, and the atomic mass of oxygen is approximately 16 g/mol.
\[ \text{Mass of O} = 4 \times 16 = 64 \text{ g/mol} \]

- **Total Molecular Mass of H₂SO₄**:
\[ \text{Molecular Mass of H₂SO₄} = \text{Mass of H} + \text{Mass of S} + \text{Mass of O} = 2 + 32 + 64 = 98 \text{ g/mol} \]

### Step 2: Calculate the Percentage of Sulfur in H₂SO₄
- The mass of sulfur in one mole of H₂SO₄ is 32 g (from Step 1).
- The total molecular mass of H₂SO₄ is 98 g (from Step 1).

- **Percentage of Sulfur**:
\[ \text{Percentage of Sulfur} = \left( \frac{\text{Mass of S}}{\text{Molecular Mass of H₂SO₄}} \right) \times 100 = \left( \frac{32}{98} \right) \times 100 \]

- Calculating the percentage:
\[ \text{Percentage of Sulfur} = \left( \frac{32}{98} \right) \times 100 \approx 32.65\% \]

### Final Answer
The percentage of sulfur in sulfuric acid (H₂SO₄) is approximately **32.65%**.

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