Mistake Master · AP Chemistry · Unit 4 · Step-Through Animation

A New Substance Is the Only Test

Bubbles, heat, colour, noise — none of it decides. Boiling water bubbles furiously and is still H2O; rusting iron does nothing visible for a month and is chemical the whole time. There is exactly one question: is the substance you have at the end the substance you started with?

8 STEPS · 6 QUICK CHECKS · ONE TEST, NOT FOUR CLUES · v1

CHANGE CLASSIFIER
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