Calculate molecular mass of – C2H6, C12H22O11, H2SO4, H3PO4

Explanation

To calculate the molecular mass of the given compounds, we will use the atomic masses of the constituent elements. Here’s the step-by-step solution for each compound:

### 1. C2H6 (Ethane)
- **Step 1**: Identify the number of carbon (C) and hydrogen (H) atoms.
- There are 2 carbon atoms and 6 hydrogen atoms.

- **Step 2**: Use the atomic masses:
- Atomic mass of Carbon (C) = 12 g/mol
- Atomic mass of Hydrogen (H) = 1 g/mol

- **Step 3**: Calculate the total mass:
- Total mass from Carbon = 2 × 12 = 24 g/mol
- Total mass from Hydrogen = 6 × 1 = 6 g/mol

- **Step 4**: Add the total masses:
- Molecular mass of C2H6 = 24 + 6 = 30 g/mol

### 2. C12H22O11 (Sucrose)
- **Step 1**: Identify the number of carbon (C), hydrogen (H), and oxygen (O) atoms.
- There are 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms.

- **Step 2**: Use the atomic masses:
- Atomic mass of Carbon (C) = 12 g/mol
- Atomic mass of Hydrogen (H) = 1 g/mol
- Atomic mass of Oxygen (O) = 16 g/mol

- **Step 3**: Calculate the total mass:
- Total mass from Carbon = 12 × 12 = 144 g/mol
- Total mass from Hydrogen = 22 × 1 = 22 g/mol
- Total mass from Oxygen = 11 × 16 = 176 g/mol

- **Step 4**: Add the total masses:
- Molecular mass of C12H22O11 = 144 + 22 + 176 = 342 g/mol

### 3. H2SO4 (Sulfuric Acid)
- **Step 1**: Identify the number of hydrogen (H), sulfur (S), and oxygen (O) atoms.
- There are 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.

- **Step 2**: Use the atomic masses:
- Atomic mass of Hydrogen (H) = 1 g/mol
- Atomic mass of Sulfur (S) = 32 g/mol
- Atomic mass of Oxygen (O) = 16 g/mol

- **Step 3**: Calculate the total mass:
- Total mass from Hydrogen = 2 × 1 = 2 g/mol
- Total mass from Sulfur = 1 × 32 = 32 g/mol
- Total mass from Oxygen = 4 × 16 = 64 g/mol

- **Step 4**: Add the total masses:
- Molecular mass of H2SO4 = 2 + 32 + 64 = 98 g/mol

### 4. H3PO4 (Phosphoric Acid)
- **Step 1**: Identify the number of hydrogen (H), phosphorus (P), and oxygen (O) atoms.
- There are 3 hydrogen atoms, 1 phosphorus atom, and 4 oxygen atoms.

- **Step 2**: Use the atomic masses:
- Atomic mass of Hydrogen (H) = 1 g/mol
- Atomic mass of Phosphorus (P) = 31 g/mol
- Atomic mass of Oxygen (O) = 16 g/mol

- **Step 3**: Calculate the total mass:
- Total mass from Hydrogen = 3 × 1 = 3 g/mol
- Total mass from Phosphorus = 1 × 31 = 31 g/mol
- Total mass from Oxygen = 4 × 16 = 64 g/mol

- **Step 4**: Add the total masses:
- Molecular mass of H3PO4 = 3 + 31 + 64 = 98 g/mol

### Final Results:
- Molecular mass of C2H6 = 30 g/mol
- Molecular mass of C12H22O11 = 342 g/mol
- Molecular mass of H2SO4 = 98 g/mol
- Molecular mass of H3PO4 = 98 g/mol