The substances present before the reaction are the reactants. (As the reaction goes through, the substances that are produced are called the products of the reaction).
False-- most of the time not enough energy is put into the system, so the compounds or whatever cant break down fully into their elements
A straight line on a distance va time graph represents constant speed
In general, the diffusion coefficient is inversely proportional to pressure. This is also an observed fact: gas production rates from coal seams tend to increase as the reservoir pressure goes down.
