That specific kind is called gas.
When you put water in a freezing temprature it becomes solid.
When you boil water it becomes gas
The chemical formula for this compound is CaCl2.
Acid - base indicators (also known as pH indicators) are substances which change color with pH. They are usually weak acids or bases. you use them if you want to know if a solution is an acid or it it's a base
Umm I think it might be a b c in order?
