Nitrogen gas (n2) and hydrogen gas (h2) combine to form ammonia (nh3).
which equation correctly represents the reaction?

Option (d) is the correct answer.

Explanation:

When nitrogen gas chemically reacts with hydrogen gas then it results in the formation of ammonia gas.

The chemical reaction equation for this will be as follows.

To balance this equation, we need to a multiply by 3 on reactant side, And, we also need to multiply by 2.

Therefore, the equation which will correctly represent this reaction will be as follows.

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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.