What concentration of nitrogen should be present in a glass of water at room frmperatrure ? Assume a temperature of `25^(@)C`, a total pressure ofone atmosphere and molefraction of nitrogen in air as 0.78 `(K_(H)"for ni trogen"=8.42x10^(-7)M/mm Hg)`.

Explanation

To find the concentration of nitrogen that should be present in a glass of water at room temperature (25°C), we will use Dalton's law of partial pressures and Henry's law. Here’s a step-by-step solution:

### Step 1: Identify the Given Data
- Total pressure (P_total) = 1 atm
- Mole fraction of nitrogen (X_N2) = 0.78
- Henry's constant for nitrogen (K_H) = 8.42 x 10^(-7) M/mm Hg

### Step 2: Calculate the Partial Pressure of Nitrogen
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