Find the percentage composition of potassium chlorate `(KClO_(3))`

Explanation

To find the percentage composition of potassium chlorate (KClO₃), we need to follow these steps:

### Step 1: Determine the molar mass of each element in KClO₃
- Potassium (K): 39 g/mol
- Chlorine (Cl): 35.5 g/mol
- Oxygen (O): 16 g/mol

### Step 2: Calculate the total molar mass of KClO₃
The formula for potassium chlorate is KClO₃, which contains:
- 1 potassium atom
- 1 chlorine atom
- 3 oxygen atoms

Now, calculate the total molar mass:
- Molar mass of K = 39 g/mol
- Molar mass of Cl = 35.5 g/mol
- Molar mass of O = 16 g/mol × 3 = 48 g/mol

Now, add them together:
\[ \text{Total molar mass of KClO₃} = 39 + 35.5 + 48 = 122.5 \text{ g/mol} \]

### Step 3: Calculate the percentage composition of each element
To find the percentage composition, use the formula:
\[ \text{Percentage of element} = \left( \frac{\text{mass of element in 1 mole}}{\text{molar mass of compound}} \right) \times 100 \]

#### Percentage of Potassium (K):
\[ \text{Percentage of K} = \left( \frac{39}{122.5} \right) \times 100 \approx 31.84\% \]

#### Percentage of Chlorine (Cl):
\[ \text{Percentage of Cl} = \left( \frac{35.5}{122.5} \right) \times 100 \approx 29.0\% \]

#### Percentage of Oxygen (O):
\[ \text{Percentage of O} = \left( \frac{48}{122.5} \right) \times 100 \approx 39.02\% \]

### Step 4: Summarize the percentage composition
- Percentage of Potassium (K): 31.84%
- Percentage of Chlorine (Cl): 29.0%
- Percentage of Oxygen (O): 39.02%

### Final Answer:
The percentage composition of potassium chlorate (KClO₃) is:
- K: 31.84%
- Cl: 29.0%
- O: 39.02%

---