Pls hurry There is a series of three chemical reactions
that form the overall chemical reaction.
(1 ➡️ 2 ➡️ 3)

How is the ΔH3 calculated if the others are known?
ΔΗ3 = ΔΗ4-(ΔΗ + ΔΗ)
ΔΗ3 = ΔΗ + ΔΗ) - ΔΗ4
ΔΗ3 = (ΔΗ, (ΔΗ,) (ΔΗ,)
ΔΗ3 = ΔΗ + ΔΗ) + ΔΗ4

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

the answer is na (sodium)