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Depression in Freezing Point

23. Two elemn...

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23. Two elemnt form compounds of formula AB2 and AB4.when dissoved in 20g of benzene 1g of AB2 lower freezing point by 2.3C and 1g of AB4 lower freezing point by 1.3C.the Kf of benzene is 5.1.the atomic mass of A and B are

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Two elements A and B form compounds of formula AB₂ and AB₄. When dissolved in 20.0g of benzene 1.0g of AB₂lowers freezing point by 2.3^°C whereas 1.0g of AB₄ lowers freezing point by 1.3^°C. The K_f for benzene. The atomic masses of A and B are

Q. Two elements

A

B

form ideal compounds of formula

A B_{2}

A B_{4}

. When dissolved in

20.0 g

1.0 g

A B_{2}

lowers freezing point by

{2.3}^{0} C

1.0 g

A B_{4}

lowers freezing point by

{1.3}^{0} C

K_{f}

5.4

. The atomic masses of

A

B

Two elements A and B form compounds of formula AB₂ and AB₄. When dissolved in 20.0g of benzene 1.0g of AB₂lowers freezing point by 2.3^°C whereas 1.0g of AB₄ lowers freezing point by 1.3^°C. The K_f for benzene. The atomic masses of A and B are

Q. Two elements

A

B

form compounds having molecular formulae

A B_{2}

A B_{4} .

When dissolved in

20.0

1.0

A B_{2}

lowers the freezing point by

{2.3}^{o} C

1.0

A B_{4}

lowers the freezing point by

{1.3}^{o} C

. The molal depression constant for benzene in

1000

5.1

. Calculate the atomic masses of

A

B

Q. Two elements 'A' and 'B' form compounds having molecular formulae

A B_{2}

A B_{4}

when dissolved in

20.0 g

1.0 g

A B_{2}

lowers the freezing pioint by

{2.3}^{\circ} C

1.0 g

A B_{4}

lowers the freezing point by

{1.3}^{\circ} C

. The molal depression constant for benzene is

5.1 K k g m o l^{- 1}

. Calculate the atomic masses of A and B.

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