Answer :

To find the molarity of a solution, we use the formula for molarity:

[tex]\[ \text{Molarity (M)} = \frac{\text{moles of solute}}{\text{liters of solution}} \][/tex]

Let's break this down step-by-step:

1. Identify the moles of solute:
The problem states that there are 0.035 moles of solute in the solution.

2. Identify the volume of the solution:
The problem states that the total volume of the solution is 0.25 liters.

3. Use the molarity formula:
Substitute the given values into the formula:
[tex]\[ \text{Molarity (M)} = \frac{0.035 \text{ moles}}{0.25 \text{ liters}} \][/tex]

4. Calculate the molarity:
Perform the division:
[tex]\[ \text{Molarity (M)} = 0.14 \text{ M} \][/tex]

Therefore, the molarity of the solution is [tex]\( 0.14 \ \text{M} \)[/tex].