40g of salt is present in 200g of solution. Calculate the mass percentage of the solution.

Options

A. 10%
B. 20%
C. 30%
D. 40%

Explanation

To calculate the mass percentage of salt in the solution, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Mass of the Solute and the Mass of the Solution:**
- Mass of the solute (salt) = 40 g
- Mass of the solution = 200 g

2. **Use the Mass Percentage Formula:**
The formula for mass percentage is given by:
\[ \text{Mass Percentage} = \left( \frac{\text{Mass of Solute}}{\text{Mass of Solution}} \right) \times 100 \]

3. **Substitute the Values into the Formula:**
- Substitute the mass of the solute and the mass of the solution into the formula:
\[ \text{Mass Percentage} = \left( \frac{40 \, \text{g}}{200 \, \text{g}} \right) \times 100 \]

4. **Calculate the Fraction:**
- Calculate the fraction:
\[ \frac{40}{200} = 0.2 \]

5. **Multiply by 100 to Get the Percentage:**
- Now, multiply by 100:
\[ 0.2 \times 100 = 20 \]

6. **Final Result:**
- Therefore, the mass percentage of the solution is:
\[ \text{Mass Percentage} = 20\% \]

### Final Answer:
The mass percentage of the solution is **20%**.

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