Before you even start taking a chemistry class, you should learn unit conversion and stoichiometry. It is very boring but once you understand how to do it the rest of chemistry will be a lot of fun.
Stoichiometry
Here are some examples of stoichiometry.
You are given 400g of NaCl and 1L of deionized water. What will be the concentration of the NaCl solution if you dissolve the NaCl in the water?
How many liters of H2 gas will it take to make 1 mol of H2O at Standard Temperature and Pressure?
How many moles of NaOH does it take to neutralize 350 mL of a 5M H2SO4 solution?
Unit Conversion
What is the molarity of a solution that contains 2oomg of Ca(OH)2?
What is the molality of that solution?
How many liters of water would it take to make a 1M solution with 5g of KOH?
Notice that all of this is algebra. There is no geometry or calculus or statistics. A large part of general chemistry can be thought of as math word problems.
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