This maybe a tad late but since it's still unanswered I'll give you a schedule of what my typical week was like in my first year at Oxford. I'm not sure what level of detail you were hoping for but I'll try my best
-Lectures are every morning from Monday to Friday, from 9am-11am (ie. 2 lectures), without fail haha. It happened twice that we didn't have a 9am lecture but unfortunately that is a rarity. Hence in total 10 hours per week.
-Labs on a monday and tuesday from 11am-5pm, which does sound horrendous, and some of the physical labs are, but in reality if you don't screw around you can get done by 3/4 so it's not that bad. Averaging out to 9/10 hours per week.
-Maths classes every week, ranging from just the one hour to two/three depending on your maths tutor. Essentially you get one problem sheet for maths every week and then you go over it in the class, plus any practise papers you might have had to do, etc. So about 4 hours per week including the worksheet.
-Physics classes a few times a term, which was strangely infrequent but again similar to the maths classes, you get a problem sheet in lectures and you go through it in the class. So in the week in which you have a physics class you have an additional 5 contact hours (including doing the problem sheet)
-Additional problem classes for physical and organic with a PhD student which is usually once a week for 2-3 hours in which you go through additional questions which are relevant to that week's tutorial.
-Finally, tutorials. This may be different at other universities, but every week you usually have one tutorial, in which you get a short reading list (essentially your lecture handouts and standard textbooks) then you answer the attached questions and hand it in. Then you have a class with your tutor (one of the professors) with one or two other people and you go through this worksheet and then answer new unseen questions. Including completing the reading, questions and the class itself it's around 8 hours a week.
Totalling all that up your contact hours per week range from 32 to 40 which does sound like a lot but you still have plenty of time to socialise, go out and be active in a society or two. It is a lot more time-consuming (read: work haha) when compared to most arts subjects but as long as you don't hate chemistry it really isn't too bad. I hope that helps, if you were looking for something more about the social life rather than the classes then I'm really sorry