Concentrated sulphuric acid has a density of 1.9 g/mL and is 99% `H_2SO_4` by weight. Calculate the molarity of `H_2SO_4` in this acid.

Explanation

To calculate the molarity of sulfuric acid (H₂SO₄) in concentrated sulfuric acid with a density of 1.9 g/mL and 99% H₂SO₄ by weight, we can follow these steps:

### Step 1: Determine the mass of the concentrated sulfuric acid
Assume we have 1 liter (1000 mL) of concentrated sulfuric acid.

Using the formula for mass based on density:
\[
\text{Mass} = \text{Density} \times \text{Volume}
...