Fordham Prep - really good site
Chemtutor - This site covers very well "dimmensional analysis" and walks you through some word problems. If you are concerned about math, this is your site!
Elementary Algebra at Mathpower - concentrate on "Solving Linear Equations" and "Solving Literal Equations" as well as "Algebra Word Problems" parts.
Algebra for Chem Students: Simple review sheet of several concepts relevant to a Chemistry students. Just make sure you skip the quadratic equation part.
Significant Figures
Fordham Prep - really good site
Word Problems
Fordham yet again!
Working with formulas
Formulas can be treated
as equations, where letters are handled just like a number would be. Math-folk
call formulas "Literal Equations". Below are very good tutorials which will
walk you through this art.
Easily
printable guide this one would be great if you cannot study in front
of a computer. Just print it and use it for bedtime reading!
Online guide - very clear and structured walk-throug. Using colors, nicely flashy, but you need to study in front of the monitor
Printable
worksheet with SOLUTION - practice your skills
A very thorough
description, more advanced; from PurpleMath