A lot of my students always wonder. Why is Chemistry so hard? Why is Chemistry important?
A teacher that I look up to once told me there is no higher road to learning. There is no way around learning science other than practice, practice, practice. Make sure that you are employing problem solving skills. When you approach a problem, one technique that I always use is to write down all the information that I can gather from the text body of the problem. And then write down what the question is asking for. This will always give you a hint as to which formula to use. This works with Chemistry, Physics, Math and a innumerous other scientific subjects.
Is Chemistry really hard? Yes it is. It is a narrow road that Medical Schools and the like use to "weed out" their students. Why Chemistry, you say? The problem-solving technique that you use to approach Chemistry problems is the same problem-solving technique you use to make prognoses. You gather all the information you have, you go back to your database, and you make links to help you identify disease. Is Chemistry important in Medical School and Nursing School? Yes it is. How else would you know how drugs interact, why pH is important, why principals of osmosis are important, and the list goes on. Almost everything goes back to Chemistry. Your body runs on the principals of Chemistry. It is the science of life.