If you get a puncture on the road it's far easier to change the tube and repair the punctured one later at home. To repair the tube you'll need a pump, tyre levers and a puncture repair kit with patches, sandpaper, a marker and glue. 2. Stand the bike upside down.
Chemical reaction. A process in which one or more substances (reactants) are chemically changed into one or more new substances (products). Chemical changes may involve motion of electrons in the forming and breaking of chemical bonds.
a chemical reaction is a process that is usually characterized by a chemical change in which the starting materials reactants are different from the products chemical reactions tend to involve the motion of electrons leading to the formation and breaking of chemical bonds b ab the combination of iron and sulfur to form iron ii sulfide is an example of a synthesis reaction 8 fe s 8 8 fes chemical decomposition or analysis reaction in a decomposition reaction a compound is broken into smaller chemical species