The friend takes a lecture of the chemistry experiment, which I took two years ago. But, as I said many times, I'm not good at studying chemistry. So, I've already forgot almost all of what I learned in the experiment.
I took a stopgap measure to reply that I would research for it.
I wish I were suitable for a scientist. But, there are many students who learn more difficult subjects than those I studied in the university. For example, a Hong Konger who is my follower on Twitter studies complicated formulas, which I'll never understand.