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When 20g of naphthoic acid (C(11)H(8)O(2...

When `20g` of naphthoic acid `(C_(11)H_(8)O_(2))` is dissolved in `50g` of benzene `(K_(f)=1.72K kg "mol"^(-1))`, a freezing point depression of `2K` is observed. The van't Hoff factor (i) is :

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