I learned today the entire chemical substance, it coming anyway only 4 things on it, so therefore not much.
So offhand I could no longer play it.
thinks uihr that enough, the read again later everything and then sleep, then read again tomorrow, so you can play it easily?
The best answer
you take a breath helium to you, which makes it easier;)
Then you probably have a problem that you do not understand it properly. If you understand it, namely, you can have everything loosely derived again in chemistry.
The kingdom I do it that way. Good luck
Chemicals must be understood not learn by heart. -.-