Chemistry
The most commonly used chemicals in the artificial rainmaking or cloud seeding are

Silver Iodide (Ag I)
Dry Ice (Frozen CO2)
All of these
Sodium Chloride (NaCl)

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Chemistry
The main use of salt in the diet is to

increase the solubility of food particles in water
make the taste of food better
produce in small amounts the hydrochloric acid required for the digestion of food
ease the process of cooking

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