Pure water can be consumed in a chemical reaction, resulting in the formation of a new product. Refer to Paragraph 4. What type of change is
this?
А
A physical change
B
A chemical change
с
A mixture change
D
A compound change

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".

window cleaner is ammonia dissolved in water. this is an example of a