Answer and Explanation:
(a) 
: its chemical name is sodium sulfate in which sodium is present as 
and sulfate is present as 
(b) 
: Its chemical name is copper nitrate which is a inorganic compound which is mostly crystalline in nature
(c)
: Its chemical name is iron carbonate or ferric carbonate
The answer would be soluble. Think of it like salt. On it's own it is the white substance that you can see, but when you put it in water and stir it disappears. It is still there, but the physical appearance has changed. Also being explosive, flammable, and reactive are all chemical properties. Hope this helped!
Less compassionate around the chocolate
I think the molecular formula would be CHO.
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