CHEM Study guides, Class notes & Summaries

AQA A-level CHEMISTRY 7405/3 Paper 3 Mark scheme June 2023 Version: 1.0 Final

6. (TCO 6) A gas at a temperature of 95 degrees C occupies a volume of 165 mL. Assuming constant pressure, determine the volume at 25 degrees C. Show your work. (Points : 5) Using Charles’ Law, ( V1/T1) = (V2/T2). First, convert temperature to KELVIN (T1 = t1 +273) Thus, T1 = 95 + 273 = 368. We have V1 (165 mL) & T2 = (25 + 273) = 298. V2 = (V1*T2)/T1 = (165 mL*298)/368 = 133.6 mL. 0 7 Short 16 7. (TCO 6) A sample of helium gas occupies 1021 mL at 719 mmHg. For a gas sample at constant tempera...

1. Question: What is the volume, in cubic centimeters, of a brick that is 4.0 in × 2.7 in × 8.0 in? 2. Question: A sailor circumnavigated the earth and covered 4,264,000 meters. Express this number in standard scientific notation. 3. Question: The state of matter for an object that has both definite volume and definite shape is 4. Question: How many of the following numbers contain 3 significant figures? 5. Question: In the spring of 2008, gasoline cost £1.029 per Liter in London. On the ...

AQA A-level CHEMISTRY 7405/1 Paper 1 Inorganic and Physical Chemistry Mark scheme June 202

Enzymes that can bind only one substrate and catalyze one reaction exhibit which type of binding specificity? correct answer: Absolute binding The rate of an enzymatic reaction will ___________________ for every 10 degrees C temperature increase until the enzyme denatures. correct answer: Double All of the following conditions may result in a rise in CKBB levels except. a. Child birth b Spinal chord injury c. Myocardial infarction d. Brain tumor correct answer: c. Myocardial infarct...

AQA A-LEVEL CHEMISTRY 7405/3 PAPER 3 MARK SCHEME JUNE 2023

2023 AQA A-level MATHEMATICS 7357/1 Paper 1 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA A-level MATHEMATICS 7357/2 Paper 2 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

UNE Biochemistry Final, Final Exam Review UNE Medical Biochemistry – Questions & Answers

PORTAGE LEARNING CHEM 210 MODULE 7 EXAM WITH VERIFIED ANSWERS True or False: The ΔG value for a particular reaction is -78kJ/mol. This value indicates the reaction is NOT spontaneous. FALSE True or false: A biochemical metabolic pathway is a single reaction that converts starting material into products. FALSE True or false: Three ATP molecules are used in the energy-investing stage of glycolysis. FALSE True or False: The citric acid cycle occurs in the absence of...