When particles of the collision, a chemical reaction occurred or not. Also, depending on the direction of the collision with the reaction between hydrogen gas and iodine gas equation.
When the particles of a substance is a chemical reaction collision occurred or pellets? Also, depending on the direction to collide with a gas, such as hydrogen gas during the reaction with an equation: Odin.
When particles of substances together, and then there will be a chemical reaction, or is not given to the direction of the crash, such as reaction between hydrogen gas and gas, the earth as a perfect