A student takes a sample of KOH solution and dilutes it to a total of 487.59 mL. If the diluted solution is 1.51 M KOH and its original concentration was 2.53 M, what was the volume of the original sample?

B. nuclear reactions could first occur.

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -