In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl42-. Co2+(aq) is pink and CoCl42-(aq) is blue.

At Low Temperature the pink color predominates. At High Temperature the blue color is strong.

If we represent the equilibrium as:

COCl4^2-(aq) <--> CO2+(aq) + 4Cl-(aq)

We can conclude that:

1. This reaction is:

a. Exothermic

b. Endothermic

c. Neutral

d. More information is needed to answer this question.

2. When the temperature is decreased the equilibrium constant, K:

a. Increases

b. Decreases

c. Remains the same

d. More information is needed to answer this question.

3. When the temperature is decreased the equilibrium concentration of Co2+:

a. Increases

b. Decreases

c. Remains the same

d. More information is needed to answer this question.

the movie was based there, and all the animals and characters are native.

~courtney

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