Paper - Revision Science
... D it cannot be poisoned. (Total for Question 12 = 1 mark) 13 In the reaction of benzene with chloromethane, aluminium chloride is added because it reacts with A benzene to produce an electrophile. B benzene to produce a nucleophile. C chloromethane to produce a nucleophile. D chloromethane to produc ...
... D it cannot be poisoned. (Total for Question 12 = 1 mark) 13 In the reaction of benzene with chloromethane, aluminium chloride is added because it reacts with A benzene to produce an electrophile. B benzene to produce a nucleophile. C chloromethane to produce a nucleophile. D chloromethane to produc ...
Unit 13, Lesson 1
... chloride, bromide, and iodide ions in solution. In fact, molecular fluorine is so reactive that it also attacks water; thus these reactions cannot be carried out in aqueous solutions. On the other hand, molecular chlorine can displace bromide and iodide ions in aqueous solution. Cl2(g) + 2KBr(aq) ...
... chloride, bromide, and iodide ions in solution. In fact, molecular fluorine is so reactive that it also attacks water; thus these reactions cannot be carried out in aqueous solutions. On the other hand, molecular chlorine can displace bromide and iodide ions in aqueous solution. Cl2(g) + 2KBr(aq) ...
HONG KONG DIPLOMA OF SECONDARY EDUCATION
... Mars is the fourth planet from the Sun. Mars has a very different atmosphere from that of the Earth. The atmosphere is relatively thin with an average pressure of 0.6 kilopascals (kPa) (compared to Earth’s 101.3 kPa). It is actually less than 1% the atmospheric density of Earth. Therefore, there is ...
... Mars is the fourth planet from the Sun. Mars has a very different atmosphere from that of the Earth. The atmosphere is relatively thin with an average pressure of 0.6 kilopascals (kPa) (compared to Earth’s 101.3 kPa). It is actually less than 1% the atmospheric density of Earth. Therefore, there is ...
Chemistry 12 - Correspondence Studies
... reaction can be measured using an instrument called a calorimeter. A simple laboratory calorimeter is shown on page 357 of the text. The polystyrene cup acts as an insulator to reduce heat flow to the surroundings. The chemical reaction takes place in the calorimeter and the change of temperature du ...
... reaction can be measured using an instrument called a calorimeter. A simple laboratory calorimeter is shown on page 357 of the text. The polystyrene cup acts as an insulator to reduce heat flow to the surroundings. The chemical reaction takes place in the calorimeter and the change of temperature du ...
Redox Reactions - hrsbstaff.ednet.ns.ca
... Oxidation and reduction reaction = redox rxn Oxidation is loss of electrons and reduction is gain of electrons = transfer of electrons Those 2 reactions are occurring simultaneously ...
... Oxidation and reduction reaction = redox rxn Oxidation is loss of electrons and reduction is gain of electrons = transfer of electrons Those 2 reactions are occurring simultaneously ...
1. Bromine exists naturally as a mixture of bromine
... Vitamin C contains the elements C, H, and O. It is known to contain 40.9% C and 4.58% H by mass. The molar mass of vitamin C has been found to be about 180. The molecular formula for vitamin C is: A) C2H3O2 ...
... Vitamin C contains the elements C, H, and O. It is known to contain 40.9% C and 4.58% H by mass. The molar mass of vitamin C has been found to be about 180. The molecular formula for vitamin C is: A) C2H3O2 ...
Chapter 7: Recent advances in enzyme technology
... present in a vast molar excess over other potential acceptor molecules so no reaction occurs other than hydrolysis. Also, the normal 'concentration' of water (about 55.5 M) is much greater than its typical Km (about 50 mM) and the rate of hydrolysis will not be affected as the reaction proceeds. By ...
... present in a vast molar excess over other potential acceptor molecules so no reaction occurs other than hydrolysis. Also, the normal 'concentration' of water (about 55.5 M) is much greater than its typical Km (about 50 mM) and the rate of hydrolysis will not be affected as the reaction proceeds. By ...
Acrobat - chemmybear.com
... B Review your functional groups. “A” is ether, “C” is carboxylic acid, “D” is ester. C You can place two Br’s on a benzene ring three different ways… ortho-, meta-, and para- ...
... B Review your functional groups. “A” is ether, “C” is carboxylic acid, “D” is ester. C You can place two Br’s on a benzene ring three different ways… ortho-, meta-, and para- ...
chemistry
... The active ingredient in the pain reliever aspirin is acetylsalicylic acid. This compound can be produced by reacting salicylic acid with acetic acid. The label of one aspirin bottle indicates that the accepted mass of acetylsalicylic acid in each tablet is 325 milligrams. In a laboratory, an aspiri ...
... The active ingredient in the pain reliever aspirin is acetylsalicylic acid. This compound can be produced by reacting salicylic acid with acetic acid. The label of one aspirin bottle indicates that the accepted mass of acetylsalicylic acid in each tablet is 325 milligrams. In a laboratory, an aspiri ...
Final Exam Review
... 65. Which pair of atoms is most likely to form a covalent chemical bond? (Ch. 12) a. H and H d. Na and Cl b. He and Ne e. Li and Br c. Na and Na 66. Which of the following is likely to have the largest radius? (Ch. 11) a. H d. Rb b. Mn e. Ag c. Cl 67. Which property is not a characteristic of the al ...
... 65. Which pair of atoms is most likely to form a covalent chemical bond? (Ch. 12) a. H and H d. Na and Cl b. He and Ne e. Li and Br c. Na and Na 66. Which of the following is likely to have the largest radius? (Ch. 11) a. H d. Rb b. Mn e. Ag c. Cl 67. Which property is not a characteristic of the al ...
Dear Chemistry Student, I am excited that you have chosen to
... 40. If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be? 41. A toy balloon has an internal pressure of 1.05 atm and a volume of 5.0 L. If the temperature where the balloon is released is 20°C ...
... 40. If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be? 41. A toy balloon has an internal pressure of 1.05 atm and a volume of 5.0 L. If the temperature where the balloon is released is 20°C ...
File
... Solar - The energy from the sun is inexhaustible, but we can only collect it poorly at present. It is a good energy source to not replace our current sources, but to supplement them and allow us to conserve our fossil fuels and use them more wisely. Geothermal - There are only a few areas around the ...
... Solar - The energy from the sun is inexhaustible, but we can only collect it poorly at present. It is a good energy source to not replace our current sources, but to supplement them and allow us to conserve our fossil fuels and use them more wisely. Geothermal - There are only a few areas around the ...
Powerpoint
... (b) Strictly speaking, Hof for aqueous ions depends on their concentrations. For example, heat changes for dissolving one mole of NaCl in 1 L of water and in 10000 L of water are different. We usually assume the concentration is indefinitely low. • Hof values for many compounds are tabulated. If t ...
... (b) Strictly speaking, Hof for aqueous ions depends on their concentrations. For example, heat changes for dissolving one mole of NaCl in 1 L of water and in 10000 L of water are different. We usually assume the concentration is indefinitely low. • Hof values for many compounds are tabulated. If t ...
RES8_chemcontentchecklist
... Explain that addition reactions have an atom economy of 100% whereas substitution reactions are less efficient. Carry out calculations to determine the atom economy of a reaction. Describe the benefits of developing chemical processes with a high atom economy in terms of fewer waste materials. Expla ...
... Explain that addition reactions have an atom economy of 100% whereas substitution reactions are less efficient. Carry out calculations to determine the atom economy of a reaction. Describe the benefits of developing chemical processes with a high atom economy in terms of fewer waste materials. Expla ...
2013 Chemistry examination report
... The 2013 Chemistry examination, the first two-and-a-half hour end-of-year examination, was based on the key knowledge and key skills for both Units 3 and 4. Well-prepared students were able to attempt, and generally complete, all questions on the examination within the allocated time. There were man ...
... The 2013 Chemistry examination, the first two-and-a-half hour end-of-year examination, was based on the key knowledge and key skills for both Units 3 and 4. Well-prepared students were able to attempt, and generally complete, all questions on the examination within the allocated time. There were man ...
WELCOME TO CLASS XII ORIENTATION IN CHEMISTRY SOME
... Transition metals show variable oxidation states due to the involvement of (n-1) d electrons along with ns electrons in bond formation The E0 (Mn+/M) values for 3d series does not follow a regular trend .This is due to irregularity in ionization enthalpy and heat of atomization. Transition met ...
... Transition metals show variable oxidation states due to the involvement of (n-1) d electrons along with ns electrons in bond formation The E0 (Mn+/M) values for 3d series does not follow a regular trend .This is due to irregularity in ionization enthalpy and heat of atomization. Transition met ...
Lab Stuff - WW-P K
... What types of substances are removed from mixtures using filtration? Adsorption? Distillation? Think about the foul water lab! ...
... What types of substances are removed from mixtures using filtration? Adsorption? Distillation? Think about the foul water lab! ...
Redox Reactions and Electrochemistry
... must equal the number gained by the reduced one) 7) Add half-reactions and cancel electrons and other common species on left and right sides of the equation. 8) Check Reaction! It should be balanced in terms of oxidation states, charge and atoms. IF NOT, YOU HAVE MADE A MISTAKE! ...
... must equal the number gained by the reduced one) 7) Add half-reactions and cancel electrons and other common species on left and right sides of the equation. 8) Check Reaction! It should be balanced in terms of oxidation states, charge and atoms. IF NOT, YOU HAVE MADE A MISTAKE! ...
welcome to ap chemistry - Garnet Valley School District
... The work is split into two assignments: One for all students and an additional one for students who have not taken Honors Chemistry. The work is split into a weekly schedule, but you may also complete it at your own pace. However, I would recommend you do not procrastinate, and that you give yoursel ...
... The work is split into two assignments: One for all students and an additional one for students who have not taken Honors Chemistry. The work is split into a weekly schedule, but you may also complete it at your own pace. However, I would recommend you do not procrastinate, and that you give yoursel ...
chemical reaction equation - parmod cobra insititution.
... ZnO(s) + CO2(g) This reaction is a double-displacement reaction. Why should a magnesium ribbon be cleaned before burning in air? Magnesium reacts with the constituent gases of the atmosphere to from various compound which get deposited over its surface. The ribbon is cleaned before burning to rem ...
... ZnO(s) + CO2(g) This reaction is a double-displacement reaction. Why should a magnesium ribbon be cleaned before burning in air? Magnesium reacts with the constituent gases of the atmosphere to from various compound which get deposited over its surface. The ribbon is cleaned before burning to rem ...
Final Exam Review 2010 UbD
... 16. What is the charge, location and mass of a proton? ___________________________________________ 17. What is the charge, location and mass of a neutron? __________________________________________ 18. What is the charge, location and mass of an electron? _________________________________________ 19 ...
... 16. What is the charge, location and mass of a proton? ___________________________________________ 17. What is the charge, location and mass of a neutron? __________________________________________ 18. What is the charge, location and mass of an electron? _________________________________________ 19 ...
Fall 2013 Final practice questions w/o solution
... 8. Which statement best explains why the electron affinity of B is less positive than that of Li? A) B has electrons in p orbitals, so it is lower in energy. B) Li does not want to gain an electron because it already has a half-full s orbital. C) B is a smaller atom, so its valence electrons are mo ...
... 8. Which statement best explains why the electron affinity of B is less positive than that of Li? A) B has electrons in p orbitals, so it is lower in energy. B) Li does not want to gain an electron because it already has a half-full s orbital. C) B is a smaller atom, so its valence electrons are mo ...
Bioorthogonal chemistry
The term bioorthogonal chemistry refers to any chemical reaction that can occur inside of living systems without interfering with native biochemical processes. The term was coined by Carolyn R. Bertozzi in 2003. Since its introduction, the concept of the bioorthogonal reaction has enabled the study of biomolecules such as glycans, proteins, and lipids in real time in living systems without cellular toxicity. A number of chemical ligation strategies have been developed that fulfill the requirements of bioorthogonality, including the 1,3-dipolar cycloaddition between azides and cyclooctynes (also termed copper-free click chemistry), between nitrones and cyclooctynes, oxime/hydrazone formation from aldehydes and ketones, the tetrazine ligation, the isocyanide-based click reaction, and most recently, the quadricyclane ligation.The use of bioorthogonal chemistry typically proceeds in two steps. First, a cellular substrate is modified with a bioorthogonal functional group (chemical reporter) and introduced to the cell; substrates include metabolites, enzyme inhibitors, etc. The chemical reporter must not alter the structure of the substrate dramatically to avoid affecting its bioactivity. Secondly, a probe containing the complementary functional group is introduced to react and label the substrate.Although effective bioorthogonal reactions such as copper-free click chemistry have been developed, development of new reactions continues to generate orthogonal methods for labeling to allow multiple methods of labeling to be used in the same biosystems.