calculate the molarity of a Solution of ethanol in water in which the mole fraction of ethanol is 0.40.

Calculate the molarity of a solution containing 2.8g of KOH per litre (molar mass of KOH = 56).

What mass of ethanol be added to 1.0kg water to have the mole fraction of ethanol equal to 0.202 a)63.89g b)6.39g c)638.89g d)683.89g

a. Calculate the number of molecules in 5 moles of water.

calculate the molality of a solution containing 10 g of NaOH in 200cm^3 of solution. Density of solution is 1.4g/mL.(Molar mass of NaOH=40).

The molality of an aqueous solution of methanol (CH_3OH) is 1.44 mol kg ""^(-1) . The mole fraction of methanol in the solution will be

A solution of glucose in water is labelled as '10 % w / w', what would be the molality and mole tion of each component in the solution? If the density of solution is '1.2 ~g ~mL^-1', then what shall be the molarity of the solution?

Calculate the molarity of NaOH in the solution prepared by dissolving its 4 g in enough water to form 250 mL of the solution.

The vapour pressure of a solvent decreased by 10 mm of Hg when a non-volatile solute was added to the solvent. The mole fraction of solute in solution is 0.2, what would be the mole fraction of solvent if the decrease in vapour pressure is 20 mm of Hg.

The Henry's law constant for the solubility of N_2 gas in water at 298 K is 1.0 xx 10^(5) atm. The mole fraction of N_2 in air is 0.8. The number of moles of N_2 from air dissolved in 10 mole of water at 298 K and 5 atm pressure is: