Let me show you one of my favourite reactions. This fine powder is iron. When we sprinkle it over the flame, it lights up like a sparkler. The iron is reacting with the oxygen in the air to make a ...

Details of the chemical reaction of oxygen with the [Fe-S] cluster reveal how this cofactor is used for oxygen sensing.

The substance that reacts with the candle wax is oxygen. It comes from the air. Putting the jar over the candle keeps oxygen from outside the jar from getting in. The reaction can only use the oxygen ...