How can you detect that a chemical reaction has occurred? select all that apply

You can detect a chemical reaction if you see that the color has change,see gas has formed,and a precipitate has formed.

This is what i found “nuclear fuel is material used in nuclear power stations to produce heat to power turbines. heat is created when nuclear fuel undergoes nuclear fission. most nuclear fuels contain heavy fissile actinide elements that are capable of undergoing and sustaining nuclear fission.” i hope this you for what your looking for. can you plz mark me brainliest?

The molecules contain like 54 of water