So your question really is, in the absence of a grade 7 in GCSE Maths, will A’level Chemistry suffice? The answer is ‘no. You have to meet the requirements as stated, there is usually some flexibility on entry requirements though but usually not for subjects, you do need to have GCSE Maths at that grade. However, in the current climate of universities scrambling for students as a result of the pandemic, there is every chance they might lower some of their requirements e.g Grade 6 in Maths. Let’s keep fingers crossed that you’ll get a 7 in Maths when results come out.