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How many moles of ethylene glycol must be added to 1.0 kilograms of water to produce a solution that boils at 105.0 degrees Celsius? The boiling point elevation constant for water is 0.512 degrees Celsius per mole.

A9.77 mol
B4.89 mol
C2.56 mol
D0.512 mol

Verified Answer :

lulu1991

The temperature change is 105-100=5. The elevation constant for water is 0.512. So the mole of ethylene glycol is 5/0.512=9.77. So the answer is a. 9.77 mole.

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