Reaction scheme - Study guides, Class notes & Summaries

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath NOT any ind...

2023 AQA GCSE CHEMISTRY 8462/2H Paper 2 Higher Tier Question Paper & Mark H scheme (Merged) June 2023 [VERIFIED] GCSE CHEMISTRY Higher Tier Paper 2 Tuesday 13 June 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all...

2023 AQA GCSE CHEMISTRY 8462/2H Paper 2 Higher Tier Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] GCSE CHEMISTRY Higher Tier Paper 2 H Tuesday 13 June 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer a...

The term greenhouse effect refers to the idea that correct answers The temperature of the earth is increasing because of heat trapped by gasses such as CO2 What is the overall reaction for the Calvin Cycle, or dark reactions? correct answers 3CO2 + 6NADPH + 9ATP + 6H2O --> Glyceraldehyde-3-Phosphate + 6 NADP+ + 9ADP + 9Pi What is the overall balanced reaction for the light reactions of photosynthesis? correct answers 2H2O + 8photons + 2NADP+ + 3ADP + 3Pi --> O2 + 2NADPH + 3ATP For...

AQA 2024 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper & Mark scheme + Insert (Merged) June 2024 Updated Version Silver nitrate+ nitric acid + chloride ions - Correct Answer>>White precipitate Silver nitrate+ nitric acid + bromide ions - Correct Answer>>Cream precipitate Silver nitrate+ nitric acid + iodide ions - Correct Answer>>Yellow precipitate Substances that decolourised bromine water - Correct Answer>>Alkenes Electrophiles -...

A good transition-state analog: A) binds covalently to the enzyme. B) binds to the enzyme more tightly than the substrate. C) binds very weakly to the enzyme. D) is too unstable to isolate. E) must be almost identical to the substrate. - Answer-binds to the enzyme more tightly than the substrate. A major advance in the application of mass spectrometry to macromolecules came with the development of techniques to overcome which of the following problems? A) Macromolecules were insoluble i...

Pearson Edexcel Mark Scheme (Results) Mark Scheme (Results) June 2022 Pearson Edexcel GCSE Psychology 1PS0/01 Paper 1 Edexcel and BTEC Qualifications Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We provide a wide range of qualifications including academic, vocational, occupational and specific programmes for employers. For further information visit our qualifications websites at or . Alternatively, you can get in touch with us using the ...

2023 AQA A-level CHEMISTRY 7405/3 Paper 3 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. A-level CHEMISTRY Paper 3 Friday 23 June 2023 Morning Time allowed: 2 hours Materials For this paper you must have: • the Periodic Table/Data Booklet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scie...

2023 AQA A-level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. A-level CHEMISTRY Paper 2 Organic and Physical Chemistry Monday 19 June 2023 Afternoon Time allowed: 2 hours Materials For this paper you must have: • the Periodic Table/Data Booklet, provided as an insert...