What is true about a system in chemical equilibrium?No reactants remain in the system. The amount of product equals the amount of reactant. The amount of reactant changes, but over time remains about the same. There are no products in the system.

The amount of product equals the amount of reactant

Explanation:

A system is said to be in equilibrium when there is no observation change in the system with time.

In a chemical equilibrium, the reactants undergoes a change to arrive at the products which are inturn reconverted to the reactants at the same rate.

Therefore, we can say that a chemical system attains equilibrium when the rate of formation of the products is the same as the rate of formation of the reactants i.e the reactants and the products are equal.

a) the particles of the chair are strongly held together.