Many of these are expressed as simple algebraic equations. You must know the meaning of each symbol used in the equation. Once you have the equation and the data provided, you are on your way to solving the problem. The algebra required is very simple. Do all the exercises on the attached math sheet , page 5, to familiarize yourself with the algebra required.
Chemistry is a cumulative subject where one principle builds upon another.
If you do not master the principles discussed today, you will have difficulty understanding the principles to be discussed tomorrow. Therefore, keep up . Don't play the catch-up game. You will not succeed. Following the above suggestions you should be able to solve a majority of chemical problems.