Chemisrty - Study guides, Class notes & Summaries

A LEVEL Chemisrty June 2020 Paper 2 Questions From Real Exams 1 2 Section A Answer all questions in this section. Do not write outside the box This question is about 1-chloropropane. . Define the term standard enthalpy of formation. [2 marks] . The equation for a reaction used to manufacture 1-chloropropane is 3CH3CH2CH2OH(l) + PCl3(l)  3CH3CH2CH2Cl(l) + H3PO3(s) The enthalpy change for this reaction, ΔH, is –114 kJ mol–1 Table 1 contains some standard enthalpy of formati...

OCR A LEVEL CHEMISRTY EXAM 2019 WITH 100% CORRECT QUESTIONS AND ANSWERSOCR A LEVEL CHEMISRTY EXAM 2019 WITH 100% CORRECT QUESTIONS AND ANSWERSOCR A LEVEL CHEMISRTY EXAM 2019 WITH 100% CORRECT QUESTIONS AND ANSWERSOCR A LEVEL CHEMISRTY EXAM 2019 WITH 100% CORRECT QUESTIONS AND ANSWERS

OCR A LEVEL CHEMISRTY EXAM 2019 WITH 100% CORRECT QUESTIONS AND ANSWERS

A LEVEL Chemisrty June 2020 Paper 2 Questions From Real Exams 1 2 Section A Answer all questions in this section. Do not write outside the box This question is about 1-chloropropane. . Define the term standard enthalpy of formation. [2 marks] . The equation for a reaction used to manufacture 1-chloropropane is 3CH3CH2CH2OH(l) + PCl3(l)  3CH3CH2CH2Cl(l) + H3PO3(s) The enthalpy change for this reaction, ΔH, is –114 kJ mol–1 Table 1 contains some standard enthalpy of formatio...

1. Balance these chemical reactions: (2 point each, 8 points total) 2. Calculate the formula mass of Al2(SO4)3. (2 points) 3. Calculate the mass of 2.5 moles of NaOH. (1 points) 4. For the balanced chemical equation: Answer the following questions: a. If you produce 7 mols of KBr, how many mols of MgBr2 did you need? (1 point) b. If I have 2 moles of MgBr2, how much KBr can I make in moles? (2 points) 5. You are making 100 ml of a 2 M solution of HCl. How many ml of a 4 M HCl solution will y...

A LEVEL Chemisrty June 2020 Paper 2 Questions From Real Exams 1 2 Section A Answer all questions in this section. Do not write outside the box This question is about 1-chloropropane. . Define the term standard enthalpy of formation. [2 marks] . The equation for a reaction used to manufacture 1-chloropropane is 3CH3CH2CH2OH(l) + PCl3(l)  3CH3CH2CH2Cl(l) + H3PO3(s) The enthalpy change for this reaction, ΔH, is –114 kJ mol–1 Table 1 contains some standard enthalpy of formatio...

A LEVEL Chemisrty June 2020 Paper 2 Questions From Real Exams 1 2 Section A Answer all questions in this section. Do not write outside the box This question is about 1-chloropropane. . Define the term standard enthalpy of formation. [2 marks] . The equation for a reaction used to manufacture 1-chloropropane is 3CH3CH2CH2OH(l) + PCl3(l)  3CH3CH2CH2Cl(l) + H3PO3(s) The enthalpy change for this reaction, ΔH, is –114 kJ mol–1 Table 1 contains some standard enthalpy of formati...

OCR A LEVEL CHEMISRTY EXAM 2019 WITH 100% CORRECT QUESTIONS AND ANSWERS alkali - ANSWER-A type of base that dissolves in water forming hydroxide ions, OH- (aq) ions. alkanes - ANSWER-The homologous series with the general formula: CnH2n+2. alkyl group - ANSWER-An alkane with a hydrogen atom removed, e.g. CH3, C2H5; alkyl groups are often shown as 'R'. amount of substance - ANSWER-The quantity whose unit of the mole. Chemists use 'amount of substance' as a m...

CHEM 120 Week 3 Assignment; Stoichiometry and Solution Chemisrty

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