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Cryoscopic constant from mass of solute, mass of solvent, molar mass and depression in freezing point

The same question, asked 2 times: 9 May 2023 S1*, 9 May 2024 S2. Every wording below, oldest first.

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  1. Question 1

    9 May 2023 S1

    58
    Calculate the cryoscopic constant of solvent when 2.5 gram solute is dissolved in 35 gram solvent lowers its freezing point by 3 K. (molar mass of solute is 117 g mol−1117\,\text{g\,mol}^{-1})

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  2. Question 2

    9 May 2024 S2

    58
    A solution of nonvolatile solute is obtained by dissolving 1 g in 100 g solvent, decreases its freezing point by 0.3 K. Calculate cryoscopic constant of solvent if molar mass of solute is 60 g mol−1^{-1}.

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