From the following list of aqueous solutions and water, select the one with the highest freezing point. a. 1.0 m kno3 b. 75 m nacl c. 75 m cucl2 d. 2.0 m c12h22o11 (sucrose) e. pure water

The highest freezing point will be of pure water.

Explanation:

The following are colligative properties:

a) elevation in boiling point

b) relative lowering of vapor pressure

c) depression in freezing point

d) osmotic pressure

The above four properties, depends upon the number of solute particles present.

In case of solute of same concentration, the freezing point depression will be same for aqueous solutions.

If the solute is electrolytic, then the concentration of ions will be counted separately.

Due to addition of any electrolyte the freezing point of water decreases.

So the highest freezing point will be of pure water.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

lol for the pointsss