User:Plop/Some equations

Here are some equations which are probably only useful to me.

Reaction rates

"Easy" reaction rate formula

$\text{reaction rate}=\frac{\text{change in mass or concentration}}{\text{time taken}}$

Example

$\begin{array}{ccc}\text{reaction rate}& =& \frac{\text{change in mass of magnesium}}{\text{time taken}}\\ & =& \frac{0.1}{10}\text{g magnesium used up per second}\\ & =& 0.01{\text{gs}}^{-1}\\ & \text{or}& 0.01\frac{\text{g}}{\text{s}}\\ & \text{or}& 0.01\text{ grams per second}\\ \end{array}$