Answer is gas for sure and I think it’s ice for question 2
I’m assuming the cordial is cocoa, two cups equals a pint. So he should add 1 pint or 2cups of water. Whichever measurement you need.
2KBrO₃(s) = 2KBr(s) + 3O₂(g)
Oxygen gas is formed.
This food supplement E924 is banned in some countries.
The evidence that a chemical reaction occurred is can be change in color , formation of a precipitate , Here in the case when 6 m HCl to the solution of sodium acetylsalicylate, the formation of precipitate that is of aspirin takes places that can be taken as a evidence that a reaction is occured. The reaction can be seen in the image attached.