Chemistry

Chemistry is a basic subject closely related to human life. The scope of it can be said to be all-encompassing, so that in human life, chemistry is everywhere. Why does the mug change color? Why can't the rice make soft bread? How does artificial snow come from? Why does the "e;warm baby"e; heat up on its own? Among kitchen utensils, why is the pot so crisp, the spoon so tough, and the knife so sh...