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A solution contains 0.8960 g of K2SO4 in...

A solution contains 0.8960 g of `K_2SO_4` in 500 mL solution. Its osmotic pressure is found to be 0.690 atm at `27^@C`. Calculate the value of Van's Hoff factor.
(At. Mass K=39.0, S=32, O-16, `R=0.082 atm mol^-1 K^-1)`.

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