Given the data below for the reaction, 2 A + 2 B + 4 C => D + E + 3 F, the reaction is first order in A, second order in B, second order in C and fifth order overall.
Experiment Initial conc of A, Initial conc of B, Initial conc of C, Initial rate,
mol/L mol/L mol/L mol/L. s 1 0.2 0.3 0.2 4 x 10-3
2 0.3 0.1 0.2 6 x 10-3
3 0.4 0.3 0.6 8 x 10-3
4 0.1 0.2 0.4 2 x 10-3

Ibelieve it is b. proton.hope my answer has you : )

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 -