If the density of water of a lake is `1.25 gmL^(-1)` and one kg of lake water contains 92 g of `Na^(+)` ions, calculate the molarity of `Na^(+)` ions in this lake water. (Gram atomic mass of `Na=23"g mol"^(-1)`)

Explanation

To calculate the molarity of \( \text{Na}^+ \) ions in the lake water, we can follow these steps:

### Step 1: Calculate the volume of lake water
Given the density of lake water is \( 1.25 \, \text{g/mL} \) and the mass of lake water is \( 1 \, \text{kg} \) (which is \( 1000 \, \text{g} \)), we can use the formula for density:

\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]
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