An element X of atomic mass 25.0 exists as X_4 in benzene to the extent of 100%. When 10.30 g of saturated sol

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Q 1210091819.     An element X of atomic mass 25.0 exists as X_4 in benzene to the extent of 100%. When 10.30 g of saturated solution of X in benzene is added to 20.0 g of benzene, the depression in freezing point of the resulting solution is 0.51 K. If K_f for benzene is  5.1 K kg mol^(–1), find the solubility of X in 100 g of benzene.
A

0.7 g

B

0.3 g

C

2.9 g

D

3.0 g

#### HINT

Use formula: ΔT_f = (1000K_f W_text(solute))/(M_text(solute)×W_text(solvent))

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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