The density of lake water is found to be 1.25 g `mL^(-1)` and contains `90 g Na^+` ions per Kg water. Calculate the molality of `Na^+~ in the lake

If the density of some lake water is 1.25 g mL^-1 and contains 92 g of Na^(+) ions per kg of water, calculate the molality of Na^(+) ions in the lake.

An antifreeze solution is prepared from 222.6 g of ethylene glycol (C_2H_6O_2) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g mL^-1 , then what shall be the molarity of the solution?

A solution containing 15g urea (molar mass = 60g/mol) per litre of solution in water is isotonic with the solution of glucose (molar masss 180g//mol ) in water calculate the mass of glucose present in one litre of its solution,.

If the density of pure water is 1g/ml then what is the molarity of water?

2000 cm^3 of an aqueous solution of a protein contains 1.26 g of the protein. The osmotic pressure of such a solution at 300K is found to be 2.57 … 10^(-3) bar. Calculate the molar mass of the protein.

Two bodies whose masses are m_1 = 50 kg and m_2 150g are tight by a string and placed in a horizontal surface. When m_1 is pulled by a force F and acceleration of 5ms^-2 is produced in both the bodies. Calculate the value of F and tension in the strong.

A solution of sucrose (molecular mass 342 u) is prepared by dissolving 0.84 g in 100g of water at 298K. Calculate the freezing point of water in the solution. (K_f for water = 1.86 K kg mol^-1)

A solution of sucrose (molecular mass 342 u) is prepared by dissolving 0.84 g in 100g of water at 298K. Calculate the boiling point of water in the solution (K_b for water = 0.52 K kg mol^-1)

When 0.15 kg of ice at 0^@C mixed with 0.30 kg of water at 50^@C in a container, the resutling temperature is 6.7^@C . Calculate the latent heat of fusion of ice. Given S_(water) = 4186J kg^-1 K^-1 .