The scientist should make a new hypothesis and do a new experiment! That is what I say!
The one that happens when the atoms of a substance are regrouped is : a new substance is formed.
After atoms being regrouped the molecules of the original substance will be different and the substance will have different properties from those of the reactans
Answer:
Explanation:
2NO3, Ca2+
Spectator ions exists in both sides of the equation. These ions are present in both sides thus cancel out (they do not contribute to reaction...i.e. they only watch or spectate ;) )
A firework exploding is a chemical change as soon as you light the fuse the combustion reacts with the gunpowder.
I hope this helps, good luck!!!!
