A]a[b]b [c]c [d]d
when the keq value is large, the number representing [a]a[b]b must be (smaller / larger) than the number representing [c]c[d]d. this relationship means that the / reactants) must be favored and that the mixture at equilibrium is largely (products/ reactants).

When the Keq value is large, the number representing [A]a[B]b must be smaller than the number representing [C]c[D]d. This relationship means that the products must be favored and that the mixture at equilibrium is largely products.

Explanation:

aA + bB ⇄ cC + dD,

Keq = ([C]^c x [D]^d)/([A]ᵃ[B]ᵇ),

So, When the Keq value is large, the number representing [A]a[B]b must be smaller than the number representing [C]c[D]d.

So, This relationship means that the products must be favored and that the mixture at equilibrium is largely products.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.