AQA AS-level Chemistry, June 2019 Paper 1 (first half) walkthrough

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AQA AS-level Chemistry, June 2019 Paper 1 (first half) walkthrough
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Why in question 5 does it say "NO mol = 1.50" but since the equation is 2NO why don't we put the start moles as 3 ?

ratofalady
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why at Q2.4 you sqaure the v*2 = d*2 / t*2 ?

elestrello
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