20 points
If you examine a piece of hail, it might have invisible layers like an onion.
Which answer best explains why this is true?
O
As hail falls, it picks up layers of dust and dirt from the air.
Hail forms layers because it melts as it falls towards the Earth.
O
Air pressure increase while the hail falls and it causes ice layers to form.
Hail builds up ice layers as it travels through updrafts in a storm before it falls.

Hail builds up ice layers as it travels through updrafts in a storm before it falls.

Explanation:

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

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