Write the skeletal formula equation for: solid potassium, K, reacts with chlorine gas, Cl2, to produce solid potassium chloride, KCI.

Let us write a chemical equation;
word equation is
Potassium metal + Chlorine Gas > Potassium Chloride
The chemical equation using symbols and formula is
K (s) +
C
l
2
(g) > 2KCl (s)
the two reactants are Potassium and Chlorine gas , and the product is Potassium Chloride.
K (s) +
C
l
2
(g) > 2KCl (s)
reactant side K = 1 product side K=2
Cl = 2 Cl =2
the number of Cl atoms on both the sides are equal, in order to balance the number of K atoms on both the sides, we add one K on the reactant side.
2K (s) +
C
l
2
(g) > 2KCl (s)
reactant side K = 1 + 1= 2 product side K=2
Cl = 2 Cl =2
the equation is now balanced.
I’m very sorry if it’s wrong I tried my best

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.