What the difference between loudness and intensity

Sound intensity is the ratio of power to surface area. Loudness is our subjective perception of sound intensity.

hope it answers the question :)

Loudness is related to the amplitude of sound waves or pressure amplitude displacement relative to atmospheric pressure, typically, whereas intensity is the rate at which power rate of energy transfer, or work per unit time is transferred across a given area Power/Area, or rate of energy transfer per unit area.

Explanation:

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

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