1 1. Give two reasons why a luminous flame is not used for heating
... a) Define the term molar enthalpy of combustion of a compound 1mk*UG* b) Calculate the molar enthalpy of formation of butane C4H10 from its elements in their normal states at standard temperature and pressure. 2mks*UG* When calcium carbonate was added to a solution of dry hydrogen chloride in methyl ...
... a) Define the term molar enthalpy of combustion of a compound 1mk*UG* b) Calculate the molar enthalpy of formation of butane C4H10 from its elements in their normal states at standard temperature and pressure. 2mks*UG* When calcium carbonate was added to a solution of dry hydrogen chloride in methyl ...
9 free IB Chem labs (sent to OCC) - VicPark-IBRoundtable-2009
... Always use crucible tongs to carry crucibles carefully, this is also so that oils and impurities from your body do not get onto them. ...
... Always use crucible tongs to carry crucibles carefully, this is also so that oils and impurities from your body do not get onto them. ...
1. Select the correct statement about subatomic particles. a
... 95. Which of the following is not a reason why actual yield is less than theoretical yield? a. impure reactants present c. loss of product during b. competing side reactions purification d. conservation of mass 96. What happens to the average kinetic energy of the particles in a sample of matter as ...
... 95. Which of the following is not a reason why actual yield is less than theoretical yield? a. impure reactants present c. loss of product during b. competing side reactions purification d. conservation of mass 96. What happens to the average kinetic energy of the particles in a sample of matter as ...
C:\My Documents\My Documents\Teaching\chem130\hunt
... to provide you with practice at solving quantitative problems. It is in your best interests to work through all these questions independently before the exam. Please note that the first midterm exam may also include questions related to Chapter 1 (Introduction) and Chapter 4 ...
... to provide you with practice at solving quantitative problems. It is in your best interests to work through all these questions independently before the exam. Please note that the first midterm exam may also include questions related to Chapter 1 (Introduction) and Chapter 4 ...
2010 `A` Levels Suggested Solutions
... but many candidates did not bring such knowledge to this question. A significant number of those who did deduce what would happen did not identify the alkene as but-1-ene, giving the ambiguous answer ‘butene’ or ‘C4H8’ which Examiners did not accept. ...
... but many candidates did not bring such knowledge to this question. A significant number of those who did deduce what would happen did not identify the alkene as but-1-ene, giving the ambiguous answer ‘butene’ or ‘C4H8’ which Examiners did not accept. ...
Chapter 4: Chemical Reaction Dynamics
... For asymmetric reactions, the transition state is usually located closer to either the reactant or the products (early or late barrier). From an inspection of the favourable reaction trajectories, it can be seen that: For an early barrier, translational excitation (high kinetic energies) of the reac ...
... For asymmetric reactions, the transition state is usually located closer to either the reactant or the products (early or late barrier). From an inspection of the favourable reaction trajectories, it can be seen that: For an early barrier, translational excitation (high kinetic energies) of the reac ...
3a-General Reactions 2010
... Any chemical reaction can be described as a molecular or atomic change. It produces one or more observable changes. e.g. color change, gas bubbles, heat, etc. Reactions are generally described as Reactant(s) --> Product(s) The reaction is written as a chemical equation with chemical formulas: 2 Na + ...
... Any chemical reaction can be described as a molecular or atomic change. It produces one or more observable changes. e.g. color change, gas bubbles, heat, etc. Reactions are generally described as Reactant(s) --> Product(s) The reaction is written as a chemical equation with chemical formulas: 2 Na + ...
Unit 2.2 Test Review Key
... 8.5D recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing substances 8.5F recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of ...
... 8.5D recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing substances 8.5F recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of ...
Fall Final 2009
... 32. Which of the following is included as a postulate in the kinetic molecular theory of an ideal gas? a. The distance between gas molecules is small compared with the size of the molecule. b. Collisions between molecules are all elastic. c. In an average collision between molecules, both molecules ...
... 32. Which of the following is included as a postulate in the kinetic molecular theory of an ideal gas? a. The distance between gas molecules is small compared with the size of the molecule. b. Collisions between molecules are all elastic. c. In an average collision between molecules, both molecules ...
Powerpoint
... physically, because the species of the two half-cells react directly without electrons going through the external circuit. ...
... physically, because the species of the two half-cells react directly without electrons going through the external circuit. ...
Measuring Rates
... The integrated rate law for a chemical reaction expresses how the concentration of a relevant reacting species changes as a function of time. Thus, it can be used to predict the time it will take for a reactant or product to reach a given concentration, or to predict such concentration at a selected ...
... The integrated rate law for a chemical reaction expresses how the concentration of a relevant reacting species changes as a function of time. Thus, it can be used to predict the time it will take for a reactant or product to reach a given concentration, or to predict such concentration at a selected ...
CHEMISTRY 102B Name Hour Exam II March 19, 2015 Signature
... This exam contains 22 questions on 9 numbered pages. Check now to make sure you have a complete exam. You have one hour and thirty minutes to complete the exam. Determine the best answer to the first 20 questions and enter these on the special answer sheet. Also, circle your responses in this exam b ...
... This exam contains 22 questions on 9 numbered pages. Check now to make sure you have a complete exam. You have one hour and thirty minutes to complete the exam. Determine the best answer to the first 20 questions and enter these on the special answer sheet. Also, circle your responses in this exam b ...
CHEM 102 FINAL EXAM WINTER 07-08
... 7. Polyamides can be produced from a. two monomers, one containing two amino groups, the other containing two carboxylic acid groups. b. one monomer, containing one amino and one carboxylic acid group. c. one monomer, containing two amide groups. d. either a or b above. ANSWER: d 8. Which statement ...
... 7. Polyamides can be produced from a. two monomers, one containing two amino groups, the other containing two carboxylic acid groups. b. one monomer, containing one amino and one carboxylic acid group. c. one monomer, containing two amide groups. d. either a or b above. ANSWER: d 8. Which statement ...
spontaneous processes
... -- To approx. K, given rxn eq and nonstandard T: 1. Use tabulated values to calc. DHo and DSo, which are “good” for all temps. 2. Use DG = DH – TDS and answers above to approx. DG at desired temp. 3. Use K = e–DG/RT to approx. K at desired temp. ...
... -- To approx. K, given rxn eq and nonstandard T: 1. Use tabulated values to calc. DHo and DSo, which are “good” for all temps. 2. Use DG = DH – TDS and answers above to approx. DG at desired temp. 3. Use K = e–DG/RT to approx. K at desired temp. ...
File
... 18. The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: 4 NH3 (g) + 7 O2 (g) → 4 NO2 (g) + 6 H2O (g) The combustion of 43.9 g of ammonia produces __________ g of NO2. A) 2.58 B) 178 C) 119 D) 0.954 19. What are the respective concentrations (M) of Fe3+ and I- afforded by ...
... 18. The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: 4 NH3 (g) + 7 O2 (g) → 4 NO2 (g) + 6 H2O (g) The combustion of 43.9 g of ammonia produces __________ g of NO2. A) 2.58 B) 178 C) 119 D) 0.954 19. What are the respective concentrations (M) of Fe3+ and I- afforded by ...
do not - wwphs
... How do enzymes work? 1) Enzymes act upon a substance called a substrate 2) The enzyme has an indent in it called the active site where the substrate can fit into, kind of like a lock and a key ...
... How do enzymes work? 1) Enzymes act upon a substance called a substrate 2) The enzyme has an indent in it called the active site where the substrate can fit into, kind of like a lock and a key ...
Click Here To File
... Chemical test to distinguish between two isomers:The isomer [Co(NH3)5Br]SO4 gives a white precipitate of BaSO4 with BaCl2 solution whereas the isomer [Co(NH3)5SO4]Br does not form this precipitate. (or any other relevant test) (a) KCN is predominantly ionic and provides cyanide ions in solution. Alt ...
... Chemical test to distinguish between two isomers:The isomer [Co(NH3)5Br]SO4 gives a white precipitate of BaSO4 with BaCl2 solution whereas the isomer [Co(NH3)5SO4]Br does not form this precipitate. (or any other relevant test) (a) KCN is predominantly ionic and provides cyanide ions in solution. Alt ...
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.