Determine mass of `NaNO_3` (g) in 50ml solution in which `Na^+` conc is 70 mg/ml.

The molarity of NaNO_(3) solution is 1 M. The density of solution is 1.25 g/ml. Calculate molality of solution. (Molar-Mass of NaNO_(3)=85 g ).

The molality of 1M NaNO_(3) solution is (d=1.25 g/ml)

The mass of Na_(2)CO_(3) required to prepare 500ml of 0.1M solution is

2.52 g of oxalic acid dehydrate was dissolved in 100 ml of water, 10 mL of this solution was diluted to 500 mL. The normality of the final solution and the amount of oxalic acid (mg/mL) in the solution are respectively-

4.5g mass of a substance (molar mass = 90g/mol) is dissolved in 250ml solution, the molarity of solution is

An aqueous solution containing 21.6 mg at a solute in 100 ml of solution has an osmotic pressure of 3.70 mm of Hg at 25^(@)C . The molecular wt of solute in g//mol is

The molarity of a solution of Na_(2)O_(3) having 10.6g//500ml of solution is