The substitution product that is supposed to be favoured. The product with retention of configuration is expected to predominate slightly because the leaving group blocks the nucleophile.
<h3>What is a substitution product?</h3>
A substitution product is a product that is gotten from a reaction in which a group of reactants is replaced by another group in the reaction.
Therefore, the substitution product is supposed to be favoured. The product with retention of configuration is expected to predominate slightly because the leaving group blocks the nucleophile.
Learn more about substitution reaction below.
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( 5) direction should same in first than opposite in last
Carbon dioxide, water, energy
The more acid the salt, the lower the pH. So we must find the salt that is most basic among the options. Our answer is

, because it is formed by a weak acid (

) with a strong base (

).
An electron number higher than the proton number I think