From the lists of available reagents select the one(s) you would use to in a preparation of acetophenone (phenyl methyl ketone) from bromobenzene. (In no case are more than three steps necessary.) Reagents Available
a. CH3COCI, AlC13
b. (CH3)2CuLi
c. CH3CHO
d. Hg(0Ac)2 H2O than NaBH4
e. CH3MgBr, then H304
f. KMna..1-1,0
g. Mg h. NaOH, H2O
h. Dess-Marlin

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied

4d^55s^1 ( third choice)