For the following reaction, the cyanide nucleophile could reasonably substitute at either of two positions. one mechanism produces 4-cyanoheptane and dimethylsulfide. the competing mechanism produces 4-methylthioheptane and acetonitrile (ch_3cn). in practice, only one substitution is observed. choose the most likely mechanistic pathway for this reaction and draw both of the products. select whether it proceeds via an sn1 or sn2 mechanism.

Ifound this on google “laws of chemical combination. it states that matter can neither be created nor destroyed. it stated that a given compound always contains exactly the same proportion of elements by weight.” i hope this you for what your looking for.

Answercreating graphs and performing calculations;

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 -