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University dependence
This problem is calculated by using the dependence of dilute solution.

Due to the addition of solute, the freezing point of water decreases or the boiling point increases, and the range of change is related to the molar concentration of solute.

The basic formula is

Temperature change = km

K is a variable constant, which can be checked. The boiling point rising constant of water is 0.512 K.kg/mol..

M is the molar concentration of solute, that is, the amount of substance dissolved in 1000g water.

0. 17 = 0.5 12 *[(0.538/M)/0.0 1]

Molar mass M= 162.03

The experimental formula is C5H7N, and the formula quantity is 8 1.

So it is twice, that is, the chemical formula is C 10H 14N2.