Two elements 'A' and 'B' form compounds having formula 'AB2' and 'AB_4' .When dissolved in '20 g' of benzene '(C_6 H_6), 1 g' of 'AB_2' lowers the freezing point by '2.3 K' whereas '1.0 g' of 'AB_4' lowers it by 1.3. K: The molar depression constant for benzene is 5.1 K kg mol −1. Calculate atomic masses of A and B.

0.48g of a substance was dissolved in 10.6 g C_6H_6. The freezing point of benzene was lowered by 1.8^@C. Calculate molar mass of the substance. Molecular depression constant for benzene is "5K kg mol"^(-1) .

1.00g of a non-electrolyte solute dissolved in 50g of benzene lowered the freezing point of benzene by 0.40K. Freezing point depression constant of benzene is 5.12K g//mol . Find the molar mass of solute. .

1.00g of a non-electrolyte solute dissolved in 50g of benzene lowered by 0.40K. The freezing point depression constant of benzene is 5.12K kg//mol . Find the molar mass of solute.

Addition of 0.643 'g of a compound to '50 mL' of 'benzene (density 0.879 g/mL) lowers the freez ing point from '5.51^circ C' to '5.03^circ C'. If 'K' for benzene is '5.12 ~K' kg mol -1 Calculate the molar mass of the compound?

What mass of NaCl ("molar mass =58.5 g mol"^(-1)) dissolved in 50g of water will lower the freezing point by 5^@C? The freezing point depression constant, K_p for water is 1.86" K kg mol"^(-1) , van't Hoff factor for NaCl is 1.87.

When 20 g of naphthoic acid (C_2H_8O_2) is dissolved in 50 gofbenzene (K_f "=1.72 K kg mol"^(-1)), a freezing point depression of 2 K is observed. The van't Hoff factor (i) is

The boiling point of benzene is 353.23K. When 1.80g of a non-volatile solute was dissolved in 90g of benzene, the boiling point is raised to 354.11K. Calculated the molar mass of the solute k_b for benzene is 2.53K kg mol^(-1)

75.2gC_(6)H_(5)OH is dissolved in 1 kg of solvent of K_(f)=14Kkg"mol"^(-1) . If the depression in freezing point is 7K, then find the percentage of dimerisation of phenol

Calculate the mass ascorbic acid (Vitamin C, C_6H_8O_6) to be dissolved in 75g of acetic acid to lower its melting point by 1.5^@c .Kf =3.9 K kg/ mol

Acetic acid dimerizes when dissolved in benzene. As a result boiling point of the solution rises by 0.36^(@)C , when 100 g of benzene is mixed with ''X'' g of acetic acid. In this solution, if experimentally measured ,measured molecular weight of acetic acid is,117.8 and molar elevation constant of benzene is I 2.57 K kg mol^(-1) what is the weight and degree of dissociation (in %) of acid in benzene?