What will 3.20 moles of o2 occupy at stp

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

What is the relation between concentration of reactants and the rate of chemical reaction?

When would a bouncy ball have the most potential energy