We're back to reading the mind of a committee. In this case, I have a state standard (Tennessee, in case you care) that says students should be able to "Identify the common outcome of all chemical changes."

What does this mean? My best guess is conservation of mass, except that's explicitly listed later on. Maybe that the identity of the substance changes?
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From: [identity profile] zingerella.livejournal.com


You know it's going to be a great Monday when the first thing you have to do, on reaching the office, is research hagfish slime.

I'm remembering, very hazily, from first-year chem, a list of things that happened that denoted a chemical, rather than a physical change, but perhaps that list was particular to when two solutions were mixed together: they could change colour, or there could be a precipitate, or they could fizz (either of those last would be state changes, of course), or one might smell something as a gas was produced (another state change). It has been many years, and I was not a very good chemistry student, so I am very likely misremembering.
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