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bagirrra123 [75]
2 years ago
15

Δtf = kf × m this formula relates the drop in freezing point (δtf) to the molal freezing point depression constant (kf) and the

molal concentration of the solute (m). under which conditions does this formula apply? when the mass of the solvent equals 1 kg when the solute is ionic, not molecular when the solute is molecular, not ionic when the solvent is water, not other liquids
Physics
2 answers:
Andrews [41]2 years ago
5 0
Answer is: <span>when the solute is molecular, not ionic.
When the solute is ionic, formula contains t</span><span>he </span>van 't Hoff factor: ΔTf = Kf · m · i.
Van 't Hoff (i) is <span>the number of dissolved particles the solute produces and it is usually i = 2,3...
</span>For molecular compounds (most non-<span>electrolytes)</span> van't Hoff factor is equal one.
zzz [600]2 years ago
5 0

The correct answer is when the solute is molecular,not ionic----Gradpoint

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An open-topped freight car with mass 24,000 kg is coasting without friction along a level track. It is raining very hard, and th
skelet666 [1.2K]

Answer:

(a) v = 3..6 m/s

(b) The rain falling downward has been able to affect the horizontal motion of the car by reducing it's velocity from 4 m/s to 3.6 m/s.

Explanation:

from the question we have the following:

mass of the car (Mc) = 24,000 kg

initial velocity of the car (u) = 4 m/s

mass of water (Mw) = 3000 kg

final velocity of the car (v) = ?

(a) we can calculate the final momentum of the car by applying the conservation of momentum where

initial momentum = final momentum

Mc x U = (Mc + Mw) x V

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v =3.6 m/s

(b) The rain falling downward has been able to affect the horizontal motion of the car by reducing it's velocity from 4 m/s to 3.6 m/s.

7 0
2 years ago
PLEASE HELP !!!
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Answer and Explanation:

The answer is <u>D) Alpha and Gamma</u>

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3 0
2 years ago
a race car driver achieved a speed of 53m/s in 14 seconds after taking off from rest from the starting line. what was the averag
Veronika [31]

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53/14

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