What are the five "clues" that a chemical change has occurred?

$i.$ $"Change in colour"$, fairly unequivocal. A colour change is usually unambiguous evidence of chemical change. $ii.$ $"Formation of a new substance"$, fairly unequivocal. Of course, how do you...

More often than not, if something gives off large amounts of heat and light, it signifies a breaking of bonds, which releases energy in the form of heat and light....

Color change is a good way to tell that a change has occurred, and there's really nothing more to say about that. However, I would warn you against using color...

The indicators of a chemical change are: gas produced (sometimes you can smell it), unexpected color change, formation of another substance, and a temperature change. Te fruit would have begun...

Different combinations of atoms have different physical properties. For instance, when iron rusts, its melting point lowers.

Chemical change is characterized by the formation of new substances and the making and breaking of strong chemical bonds. Usually the best indication that chemical change has occurred is by...

Here's the equation: $C_((s)) + O_(2(g)) rarr CO_(2(g)) + heat + light$

Since 8x3=24 and since 12x3=36 you need to add 6oz of chemical B to have 24oz of chemical A and 36oz of chemical B. Take 1/3 of the total mixture...

Physical changes are changes in the formation or state of molecules and atoms. The arrangement of the molecules and atoms is different after the change but the chemical composition of...

And typically chemical change is accompanied by a colour change, or by the formation of an insoluble precipitate or by the evolution of a gas. Some chemical reactions are more...