If youre only given the amount in moles of an unidentified chemical quantity you can calculate the number of

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

that's what i got you can count the number of atoms