Calculate the mass of `H_2SO_4` present in 250 cm of a seminormal solution.

Explanation

To calculate the mass of \( H_2SO_4 \) present in 250 cm³ of a semi-normal solution, follow these steps:

### Step 1: Understand the Definition of Semi-Normal Solution
A semi-normal solution is defined as 0.5 normal (N). This means that the concentration of the solution is half of a normal solution.

### Step 2: Calculate the Number of Equivalents
To find the number of equivalents in the solution, use the formula:
\[
...