A solution is prepared by dissolved 4 g of a solute in 18 g of water. Calculate the mass percent of the solute.

Answer

To calculate the mass percent of the solute in the solution, follow these steps:

### Step 1: Determine the mass of the solute and the solvent.
- Mass of the solute = 4 g
- Mass of the solvent (water) = 18 g

### Step 2: Calculate the total mass of the solution.
- Total mass of the solution = Mass of solute + Mass of solvent
- Total mass of the solution = 4 g + 18 g = 22 g

### Step 3: Use the formula for mass percent.
The formula for mass percent of the solute is given by:
\[ \text{Mass percent of solute} = \left( \frac{\text{Mass of solute}}{\text{Total mass of solution}} \right) \times 100 \]

### Step 4: Substitute the values into the formula.
\[ \text{Mass percent of solute} = \left( \frac{4 \, \text{g}}{22 \, \text{g}} \right) \times 100 \]

### Step 5: Calculate the mass percent.
\[ \text{Mass percent of solute} = \left( \frac{4}{22} \right) \times 100 \approx 18.18\% \]

### Final Answer:
The mass percent of the solute is approximately **18.18%**.

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