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

The density of 3 Absolution of NaCl is 1.25 g mL^(-1) Calculate molality of the solution

1.5 g of H_2 react with 14.5 g of O_2 to form water Calculate the amount of water that is formed in the reaction.

Find the molarity of water in pure water(d=1g mol^-1)

The density of 2.5 M acetic acid in water is 1.02g ml^(-1) . Calculate the molality of the solution.

Calculate the mole fraction of NaOH in a solution containing 20 g of NaOH per 360 g of water.

One mole is the amount of substance that contains as many elementary particles as 12 g of _^12C isotope of carbon. Calculate the number of moles in 1 litre of water ("Density of water is "lg//mL) . Also calculate the number of water molecules in 1 litre of water