People tend to say it is 'mathsy' but in all honesty, I don't think that is the case. Like there are some topics in which you deal with equations and you need to be able to rearrange them, put numbers in and let your calculator do the hard part.
I am terrible at maths too and I didn't find Chemistry hard because of the 'maths-heavy' topics.
In terms of how content heavy it is, I would say it is definitely less than Biology. What other subjects are you taking?