Which of the following is a part of the kinetic-molecular theory? (PLEASE HELP)
Your

Most of the volume of a gas is occupied by gas particles.

The particles of a gas are in constant, random motion.

The average kinetic energy of a gas is dependent upon the identity of the gas.

Gases have indefinite shape and indefinite volume.

Attractive forces between gas molecules must be accounted for with a gas law calculation.

2)The particles in a liquid are moving past one another constantly.

3)The particles in gas move freely in all directions.

4)The particles in a solid vibrate in a fixed position.

6)The particles in a gas have few attractions between them.

7)The particles in all states of matter are always moving.

Explanation:

120,630,890

step-by-step explanation:

110+10=120,620+10=630,880+10=890

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.