Introduction To General, Organic, And Biochemistry
12th Edition
ISBN: 9781337571357
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Chapter 22, Problem 70P
0 Nerve gases operate by forming covalent bonds at the active site of cholinesterase. Is this an example of competitive inhibition? Can the nerve gas molecules be removed by simply adding more substrate (acetyl choline) to the enzyme?
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Propagation of uncertainty. You have a stock solution certified by the manufacturer to contain 150.0±0.03 µg SO42-/mL. You would like to dilute it by a factor of 100 to obtain 1.500 µg/mL. Calculate the uncertainty in the two methods of dilution below. Use the following uncertainty values for glassware:
Glassware
Uncertainty
(assume glassware has been calibrated and treat the values below as random error)
1.00 mL volumetric pipet
0.01 mL
10.00 mL volumetric pipet
0.02 mL
100.00 mL volumetric flask
0.08 mL
Transfer 10.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask. Then take 10.00 mL of the resulting solution and dilute it a second time with a 100 mL flask.
2. Transfer 1.00 mL with a volumetric pipet and dilute it to 100 mL with a volumetric flask.
Draw all resonance structures for the following ion:
CH₂
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What is the average mass of the 10 pennies? Report your value with correct significant figures.
What is the error (uncertainty) associated with each mass measurement due to the equipment?
What is the uncertainty associated with the average value? Note that the uncertainty of the balance will propagate throughout the calculation.
What is the standard deviation of the 10 mass measurements?
Explain the difference between the propagated uncertainty and the standard deviation. Which number would you use to describe the uncertainty in the measurement?
Calculate the total mass of the pennies with associated uncertainty.
Calculate the average density of a penny based on these data. Propagate the uncertainty values for both mass and volume in your calculations.
Chapter 22 Solutions
Introduction To General, Organic, And Biochemistry
Ch. 22.1 - Prob. 22.1QCCh. 22.2 - Prob. 22.2QCCh. 22.3 - Prob. 22.3QCCh. 22.4 - Which of the following is true regarding enzymes?...Ch. 22.5 - Match the description of the enzyme process with...Ch. 22 - What is the difference between a catalyst and an...Ch. 22 - What are ribozymes made of?Ch. 22 - Would a lipase hydrolyze two triglycerides, one...Ch. 22 - Compare the activation energy in uncatalyzed...Ch. 22 - Prob. 5P
Ch. 22 - Prob. 6PCh. 22 - Prob. 7PCh. 22 - Monoamine oxidases are important enzymes in brain...Ch. 22 - Prob. 9PCh. 22 - 0 What kind of reaction does each of the following...Ch. 22 - Prob. 11PCh. 22 - In most enzyme-catalyzed reactions, the rate of...Ch. 22 - 5 At a very low concentration of a certain...Ch. 22 - 6 If we wish to double the rate of an...Ch. 22 - 7 A bacterial enzyme has the following...Ch. 22 - 8 The optimal temperature for the action of...Ch. 22 - 9 The activity of pepsin was measured at various...Ch. 22 - Prob. 18PCh. 22 - Prob. 19PCh. 22 - Prob. 20PCh. 22 - Prob. 21PCh. 22 - 4 What kind of chemical reaction occurs most...Ch. 22 - 5 Which of the following is a correct statement...Ch. 22 - Prob. 24PCh. 22 - 7 Enzymes are long protein chains, usually...Ch. 22 - Prob. 26PCh. 22 - Prob. 27PCh. 22 - 0 Can the product of a reaction that is part of a...Ch. 22 - 1 What is the difference between a zymogen and a...Ch. 22 - 2 The enzyme trypsin is synthesized by the body in...Ch. 22 - Prob. 31PCh. 22 - Prob. 32PCh. 22 - Prob. 33PCh. 22 - Prob. 34PCh. 22 - Prob. 35PCh. 22 - Prob. 36PCh. 22 - Prob. 37PCh. 22 - Prob. 38PCh. 22 - 1 After a heart attack, the levels of certain...Ch. 22 - Prob. 40PCh. 22 - Prob. 41PCh. 22 - Prob. 42PCh. 22 - 5 Chemists who have been exposed for years to or...Ch. 22 - 6 Which enzyme preparation is given to patients...Ch. 22 - 7 Chymotrypsm is secreted by the pancreas and...Ch. 22 - Prob. 46PCh. 22 - Prob. 47PCh. 22 - Prob. 48PCh. 22 - Prob. 49PCh. 22 - Prob. 50PCh. 22 - Prob. 51PCh. 22 - Prob. 52PCh. 22 - Prob. 53PCh. 22 - Prob. 54PCh. 22 - Prob. 55PCh. 22 - Prob. 56PCh. 22 - Prob. 57PCh. 22 - Prob. 58PCh. 22 - Prob. 59PCh. 22 - Prob. 60PCh. 22 - 1 Food can be preserved by inactivation of enzymes...Ch. 22 - Prob. 62PCh. 22 - 3 Would you expect to find active digestive...Ch. 22 - Prob. 64PCh. 22 - Prob. 65PCh. 22 - Prob. 66PCh. 22 - 7 An enzyme has the following pH dependence: At...Ch. 22 - Prob. 68PCh. 22 - Prob. 69PCh. 22 - 0 Nerve gases operate by forming covalent bonds at...Ch. 22 - 1 What would be the appropriate name for an enzyme...Ch. 22 - Prob. 72PCh. 22 - 3 A liver enzyme is made of four subunits: 2A and...Ch. 22 - Prob. 74PCh. 22 - Prob. 75PCh. 22 - Prob. 76PCh. 22 - Prob. 77PCh. 22 - Prob. 78PCh. 22 - Prob. 79PCh. 22 - Prob. 80PCh. 22 - Prob. 81P
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- Can you help me and explain the answers please.arrow_forwardB 1 of 2 Additional problems in preparation to Midterm #1: 1.) How can the following compounds be prepared using Diels-Alder reaction: CH3 O CN (a) (b) CN CH3 2.) What is the missing reagent in the shown reaction? H3C + ? H3C H3C CN H3C ''CN (၁) H 3.) Write the products 1,2-addition and 1,4-addition of DBr to 1,3-cyclohexadiene. Remember, D is deuterium, a heavy isotope of hydrogen. It reacts exactly like hydrogen. 4.) In the shown reaction, which will be the kinetic product and which will be the thermodynamic product? H3C CI H3C HCI H3C + 5.) Which of the following molecules is aromatic? (a) (b) (c) H 6.) Which of the following molecules is aromatic? (a) (b) (c) 7.) Write the mechanism for the shown reaction. + Ха AICI 3 CI 8.) Suggest reagents that would convert benzene into the shown compounds. CI NO2 -8-6-6-8-a (a) (b) (c) (d) (e) (a) SO3H Brarrow_forwardThe number of 2sp^2 hybridized atoms in is: A. 8; B. 6; C.4; D.2; E.0;arrow_forward
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