Which sentence correctly explains the process and conditions needed for hail to form? (2 points) Group of answer choices

The temperature of the air and the temperature of the cloud must be below zero.

Liquid water requires temperatures above 0 °C in order to remain in a liquid state.

A form of precipitation requires melting and refreezing as they fall towards the ground.

Ice chunks move around inside a cloud, bouncing into water droplets and growing as they fall.

  A form of precipitation requires melting and refreezing as they fall towards the ground.

Explanation: The hail begins as rain and freezes as it falls down to the surface.

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.

the answer to your question is c.

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