In a chemical equation what name does the left side have

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

When will le chatelier's principle come into effect? at the beginning of a reaction, when there are only reactants when a reaction has reached chemical equilibrium when a catalyst is added to a reaction mixture when a reaction is occurring but not yet at equilibrium

Which compound contain an iron with a 3+ charge