If you are asked to compare matter in solid, liquid, and gaseous states, which statement best defines a gas?

Gas is a state of indefinite expansion, where the molecules are far apart

 Gas is a state in which the molecules are far apart.

Explanation:  Solid is a state of rigidity in which the molecules are closely pack with highest forces of attraction.

Liquid is a state of flow in which the particles are less rigidly packed and thus have less forces of attraction than solid.

Gas is a state in which the molecules are farthest apart from each other as they least forces of attraction between them. These have no fixed shape and volume. They have lowest density.

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).