What is happening when the reactants begin to react? select the two correct statements. [a] + [b] decrease slowly [a] + [b] decrease rapidly [a] + [b] remain constant [cd] decrease slowly [cd] increases slowly [cd] increases rapidly

[A] + [B] decrease rapidly.

[CD] increases rapidly.

Explanation:

A + B → CD,

The reaction proceeds that A reacts with B and their concentration decreases to produce CD that its concentration increases with time.

At the beginning of the reaction; the concentration of A + B decreases rapidly and the concentration of CD increases rapidly.

Kindly, see the attached image.

[A] + [B] decrease rapidly.

[CD] increases rapidly.

idk

explanation:

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