The movie below shows some molecules in a tiny sample of a mixture of gases.

$\backslash$table$[[,$key,$],[$carbon$,$hydrogen,$],[$nitrogen$,$oxygen,$],[$chlorine$,$bromine,$]]$

Drag the slider to see how the molecules move.

$\backslash$table$[[\backslash$table$[[$Does a chemical reaction happen during this$],[$movie$?]],\backslash$table$[[$yes$],[$no$]]],[\backslash$table$[[$If a chemical reaction does happen, write a$],[$balanced chemical equation for it$.]],]]$