Calculate the concentration of nitric acid in moles per litre in a sample which has a density `1.41 g mL^(-1)` and the mass percent of nitric acid in it being `69%`.

Explanation

To calculate the concentration of nitric acid (HNO3) in moles per litre from a solution with a density of 1.41 g/mL and a mass percent of 69%, we can follow these steps:

### Step 1: Calculate the mass of the solution
Assume we have 1000 g of the solution. This makes calculations easier since the mass percent is based on 100 g of solution.

### Step 2: Calculate the mass of nitric acid in the solution
Using the mass percent of nitric acid:
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