Students observe that in the presence of sunlight, silver chloride (AgCl) will react and create chlorine gas (Cl2) and leave behind solid silver (Ag). Which of the following equations correctly models and balances this reaction and has the correct reaction type? A. AgCl + sunlight → Cl2 + Ag (synthesis reaction)

B. 2AgCl + sunlight → Cl2 + 2Ag (decomposition reaction)

C. AgCl + sunlight → Cl2 + Ag (decomposition reaction)

D. 2AgCl + sunlight → Cl2 + 2Ag (synthesis reaction)

(B) 2AgCl + sunlight → Cl2 + 2Ag (decomposition reaction) is correct option.

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

the product of the pressure and volume is also constant