mole+ratio+conversions


 * Mole ratios** are fundamentally important to chemistry, and to science in general. They help to explain the law of conservation of mass, energy, etc. in our everyday lives.

When you mix ingredients for baking, you're following a mole ratio.

When your car engine's computer calculates how much fuel and air to allow into the engine's cylinder for combustion, it's using a mole ratio.

When cells in your body use ATP to build proteins, they do so using mole ratios.

So here are some examples of how to use the mole ratio in chemistry, specifically to chemical reactions.


 * Example: combustion of octane**

Octane, a liquid hydrocarbon found in gasoline, has the chemical formula C 8 H 18. It combusts in the presence of oxygen as follows:

__2__ C 8 H 18 + __25__ O 2 --> __16__ CO 2 + __18__ H 2 O

What mass of oxygen gas would be required to burn 100 grams of octane?