The answer is option B. -4.5°C or 268.5 kelvin.
What is depression in freezing?
freezing point depression = 1.86 ° C kg/mol.
molality = 0.80 mol / 1.00 kg
T= (K ) (molality)
T = 1.86 * 0.86
- Calculate the freezing point of benzene. T = (Freezing factor of pure solvent) - (Freezing point of the answer).
- Calculate the molal concentration of the molality = moles of solute/kg of solvent. ...
- Calculate the Kf of the answer. T = (K) (m)
The freezing point of water in kelvin is 273.15 k. The relation between Celsius and Kelvin scales of temperature is TKelvin = TCelsius + 273.15. The freezing point of water in Celsius is 0 °C; hence, the freezing point is 273.15 Kelvin scale.
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