I think a lot of people get caught out with chemistry, regarding how “math-intensive” it is.
Sure, it is less so than physics, but people only ever do physics if they love that shit.
People do chemistry, often thinking they’ll be ok because it’s less “math-intensive”, and then really, really struggle with the maths.
I, along with the top universities of my country, wouldn’t recommend taking Chemistry, without taking A-level Maths (which is about equivalent to first year of university level maths in the States), in fact most universities will force students to take extra maths classes during the week, if they don’t have A level Maths. They have to do another two modules of maths, in addition to the one module of Maths for Chemists, which everyone takes.
That said, the chemistry courses, well all the courses, in the UK are much more pure and so more in-depth, than in other places. For example, if you’re doing Chemistry, that is what you’ll be doing for 90% of the time, so it might be a bit more mathematically & conceptually intense, at least for the first couple of years, than a similarly named course elsewhere. That’s what the exchange students have all said, anyway.