You meet most people outside of class at social events. I took chemistry at university too and unless you get a lucky lab partner that is not an ideal place to pick up women. A party, hooka lounge, hobby, club, etc? Now we're talking.
If you want to meet women in class take classes with lots of group projects.
The point is 70 percent of students are girls in chemistry. So why am I without girls in a department full of girls?