If a reaction system has come to equilibrium, the concentration of products can be increased
a.
only if it is not reversible.
c.
by applying le châtelier’s principle.
b.
only if the temperature is low enough.
d.
under no circumstances.

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:

it means there are 3 atoms of oxygen