4. ethylene glycol (c2h6o2) is used as an antifreeze in cars. if 400 g of ethylene glycol is added to 4.00 kg of water, what is the molality? calculate how much the freezing point of water will be lowered. the freezing-point depression constant for water is kf = –1.86°c/m. show your work.

The molality of a solution is expressed as the amount of the solute in moles per mass of the solvent in kilograms. In this case, the molality is equal to 400 g/62.07 g/mol/ 4 kg water. The molality is equal to 1.61 molal. The freezing point depression is determined through Tf- Kb*molality. Substituting, 0 deg - 1.86 * 1.61 m is equal to -2.99 degrees celsius.

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