1 approximately what will be the total solute molarity for

Question

1. Approximately what will be the total solute molarity for a 0.13 M solution of (NH₄)₂CO₃?

2. Compute the molar mass of vitamin C if a solution containing 16.7 g in 76 g of water freezes at -2.36°C. (Assume vitamin C does not ionize in water).

3. Calculate the molality of a solution that contains 96.3 g of benzoic acid, C₆H₅COOH, in 400.1 mL of ethanol, C₂H₅OH. The density of ethanol is 0.789 g/mL.

4. A solution contained 18.1 g of N₂H₄CO, 11.8 g of C₆H₁₂O₆, and 65.1 g of H₂O. Calculate the mole fraction of water.

5. The Henry's law constant (k_h) for O₂ in water at 20°C is 0.00128 mol/(L atm). How many grams of gas will dissolve in 2.46 L of H₂O in contact with pure O₂ at 2.65 atm? 

6. The solubility of a compound with a molecular weight of 199.7 is determined to be 26.9 g in 300.0 g of water at 398 K. Express this concentration in terms of molality.

7. Express the concentration of the solute from the problem above as a mole fraction.