AQA AS-level Chemistry 2020 Paper 2 (second half) walkthrough

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AQA AS-level Chemistry 2020 Paper 2 (second half) walkthrough
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final a level chem exam tomorrow! wanted to say your videos really helped with all my exams. thanks!

ncpchvn
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5:58 shouldn’t it be 4 times 16 since there’s 4 oxygens?

devk