Mole fraction of I2 (iodine) in benzene (C6H6) is 0.2 . Calculate the molality of iodine (I2) in benzene.

The relation  between molarity and mole fraction is given as below:

If the mole fraction of a solute is changed from 1/4 to 1/2 in the 800 gm of solvent . then the ratio of molality will be .

The mole fraction of glucose in aqueous solution is 0.2 , The molality of solution will be.

Calculate the mole fraction of solute in the 12 molal aqueous solution of CaCO3.

40 gm metal oxide (MO) contain 4 gm of Oxygen.Calculate the equivalent wt of a metal.

40 gm metal oxide contains 4 gm of Oxygen mean it has 36 gm of metal.

Then Equivalent wt of metal is 

  E_m = (Wt of metal/Wt of Oxygen)×8

  E_m = (36gm /4gm)×8

  E_m = 72 gm equivalent