Experienced chemist, capable of imparting the knowledge of chemistry to whomever, it always makes sense in the end.

He knows what he's doing.

Metong is a nice chap, he was always top of the science class in high school and he tutored me a lot because it was mandatory for me to take those subjects I hated Lol and he would go on to be one of the best in that field.
The last time I checked he was studying medicine, he really hacked this stuff and is really good at what he does.
So, for easy understanding of Chemistry and other related subjects or courses, choose Metong.

He has a very good students to teacher relationship which enables him provide quality tutorials on any subject he handles. His extended information on Chemistry is worth note of, notwithstanding his high experience with taking care of the said subject.