buchaell000
01.08.2019 •
Chemistry
What molality of a nonvolatile, nonelectrolyte solute is needed to raise the boiling point of water by 7.10°c (kb = 0.520°c/m)?
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Ответ:
Δ T = i Kb m
when ΔT (change in boiling point) = 7.10 C°
and i (van't Hoff factor)= 1
and Kb = 0.520
so, by substitution:
7.10 = 1*0.520 *m
m = 7.1 / 0.52 = 13.65 m
Ответ:
C.) Xe
Explanation: To figure out the answer go to the Noble Gas Family and count down 5 elements.