Chemistry concepts and calculations

13. Which of the following is a herbicide used to control weeds before the crop

13. Which of the following is a herbicide used to control weeds before the crop sprouts? Thiram Paraquatt Oust Round-up 14. Which of the following is a persistent pesticide? DDT b…

13. Which of the following is true: A. Fluorescence is always blue-shifted compa

13. Which of the following is true: A. Fluorescence is always blue-shifted compared to absorption B. The quantum yield of fluorescence measures the fraction of transitions that oc…

13. Which one of the following statements about intermolecular forces is NOT tru

13. Which one of the following statements about intermolecular forces is NOT true? (a) Ion-dipole interactions are strongest for multiply charged ions (Mg*> Na) (b) Hydrogen bo…

13. Which one of the following would be the best choice as an indicator in the t

13. Which one of the following would be the best choice as an indicator in the titration of a 0.100 M ammonia solution (NH3) with a 0.100 M hydrochloric acid solution (HCI)? [a] t…

13. Which one of these elements has the greatest metallic character A)Si B) Se C

13. Which one of these elements has the greatest metallic character A)Si B) Se C) Ge D) P E) Mn 14. The combustion reaction of glycine, CH NO, is given by the following equation G…

13. Which one of these salts will form a neutral solution on dissolving in water

13. Which one of these salts will form a neutral solution on dissolving in water? sirong actd 14. Which one of these salts will form a basic solution on dissolving in water? Neutr…

13. Which sNGT a component of waxes a. ester linkage b long chain fatty acid d l

13. Which sNGT a component of waxes a. ester linkage b long chain fatty acid d long chain akcohol 14. Cholesterol a. b. is synthesized by all organisms is a precursor to the hormo…

13. While triglycerides, proteins, and carbohydrates are all catabolized in simi

13. While triglycerides, proteins, and carbohydrates are all catabolized in similar biochemical pathways, fats present a problem that the other two nutrient types do not. Which of…

13. Why does the overloaded assignment operator need to check for assignment to

13. Why does the overloaded assignment operator need to check for assignment to self (especially in a class that holds pointers to dynamic resources)? ----------------------------…

13. Why is the slope for the first ionization energies of the Noble Gases (magen

13. Why is the slope for the first ionization energies of the Noble Gases (magenta curve) shaped the way it is? Period 2 Period3 Period 4 Ne 2000 eneray d ecreases in 1500 CI raup…

13. Without doing a calculation, predict which ofthe following statements is tru

13. Without doing a calculation, predict which ofthe following statements is true for the reaction: 2 CO(g) + O2(g) 2CO2(g)     H° =566.0 kJ: * The reaction is not spontaneous at …

13. You are performing site-directod for a protelin\'s function. Which of each p

13. You are performing site-directod for a protelin's function. Which of each pair of amino acid substitutions tisted below would you enp mutagenesis to test predictions about whi…

13. [lpt] A thin rod, 56.0 cm long, is charged uniformly with a positive charge

13. [lpt] A thin rod, 56.0 cm long, is charged uniformly with a positive charge density of 77.7 C/m. The rod is placed along the y axis and is centered at the origin. A charge of …

13. a. Create a class named Lease with fields that hold an apartment tenant’s na

13. a. Create a class named Lease with fields that hold an apartment tenant’s name, apartment number, monthly rent amount, and term of the lease in months. Include a constructor t…

13. a. Define the class bankAccount to store a bank customer’s account number an

13. a. Define the class bankAccount to store a bank customer’s account number and balance. Suppose that account number is of type int, and balance is of type double. Your class sh…

13. i. For the reaction below, Kc 0.66 at a certain temperature. If a reaction f

13. i. For the reaction below, Kc 0.66 at a certain temperature. If a reaction flask contains 1.35 M NO2, 1.35 M NO, and 1.25 M O2, will the equilibrium concentration of NO2 be gr…

13. perpendicular to a 0.90 Tuniform magHullu llllul is a) 0.17 b) 7.1 N/m c) 0.

13. perpendicular to a 0.90 Tuniform magHullu llllul is a) 0.17 b) 7.1 N/m c) 0.14 N/m d) 5.8 N/m e) 7.3 N/m of the force on a 14. Determine the magnitude and direction fiel m/s h…

13. what is the noble gases that has the same electron configuration as each of

13. what is the noble gases that has the same electron configuration as each of the ions in the compound formed for Z = 20 and Z= 16 . 14. predict and explain which of the followi…

13. –/0.1 points 0/4 Submissions Used My Notes Choose all of the processes from

13.–/0.1 points0/4 Submissions UsedMy Notes Choose all of the processes from below which describe changes which are  independent of the path by which the change occurs. the elevat…

13.) Rank the following acids in decreasing (strongest to weakes) order of acidi

13.) Rank the following acids in decreasing (strongest to weakes) order of acidity a.) V>III>I>ll IV c.) IV>III> 14.) Predict the product for the following reaction…

13.40 A reaction in which A,B, and C react to form products is zero order in A,

13.40 A reaction in which A,B, and C react to form products is zero order in A, one-half order in B and second order in C. (b) What is the overall order of the reaction? (c) By wh…

13.54 The decomposition of XY is second order in XY and has a rate constant of 6

13.54 The decomposition of XY is second order in XY and has a rate constant of 6.90x10-3 M-1 s-1 at a certain temperature. (a) What is the half-life for this reaction at an initia…

13.7.2 Consider the following system at equilibrium where delta H degree = -87.9

13.7.2 Consider the following system at equilibrium where delta H degree = -87.9 kJ/mol, and K_c = 1.20 times 10^-2, at 500 K. PCI_5(g) PCI_3(g) + CI_2(g) When 0.35 moles of PCI_5…

13.71 a and b while Hexyl butanoate 13.71 The compound 5,9,12,16 as part of a st

13.71 a and b while Hexyl butanoate 13.71 The compound 5,9,12,16 as part of a study of the male sex pheromone of a Braailan on the leaves and fruit of tomato plants (U. Chem. Ecol…

13.73 What is its molarity after a reaction time of 5.00 days? Express your answ

13.73 What is its molarity after a reaction time of 5.00 days? Express your answer using two significant figures Constants | Periodic Table Hydrogen iodide decomposes slowly to H2…

13.8 Postlab Questions 1. Three of the liquids, butanone, 1-butanol and pentane

13.8 Postlab Questions 1. Three of the liquids, butanone, 1-butanol and pentane had nearly the same molecu- lar weights, but significantly different AT values. Explain the differe…

13.Which of the following gases has the lowest molar entropy at STP? A. Xenon B.

13.Which of the following gases has the lowest molar entropy at STP? A. Xenon B. Krypton C. Radon D. Neon E. Argon 14. For which of the following will the entropy of the system in…

13.a) Predict the number of subshells in the fourth shell, that is, for n=4. b)

13.a) Predict the number of subshells in the fourth shell, that is, for n=4. b) Give the label for each of these subshells. c) How many orbitals are in each of these subshells? Wr…

13/2017 If a buffer is pr epared using 0.75 mol CH,COOH and 0.45 molCH,Coo in 1

13/2017 If a buffer is pr epared using 0.75 mol CH,COOH and 0.45 molCH,Coo in 1 liter of aqueous solution, is the buffering capacity of the solution great enough to maintain its p…

130 12) 110 00 AH, x 2 kl/mol 9) 80- AH 0.24 kJ/mol 70 40 30 Heal Added Use the

130 12) 110 00 AH, x 2 kl/mol 9) 80- AH 0.24 kJ/mol 70 40 30 Heal Added Use the diagram above to answer the next three questions about methane, CH4. 10. How much energy is require…

130 kg of crushed glass particles with a diameter of 60 mu m and particle densit

130 kg of crushed glass particles with a diameter of 60 mu m and particle density of 2500 kg/m^3 are fluidized by water in a circular bed of cross-sectional area 0.2 m^2. The volt…

1306 Exam III Spring 2016 Print Name (Legibly) Student ID Number: (Last) (First)

1306 Exam III Spring 2016 Print Name (Legibly) Student ID Number: (Last) (First) A. (16 points). how tini Show how you do the calculation and then determine the pH when 200. mL of…

131 Name Locker Number_ Date, Piease print last name firet PRELIMINARY EXERCISES

131 Name Locker Number_ Date, Piease print last name firet PRELIMINARY EXERCISES: Experiment 9 Analysis of a KCio-KCI Mixture 1. Aluminum powder can burn in pure oxvgen to form al…

132-02 201820/0eh -1459489-dt-content-rid-13598452 7courses/CHEM 17. Which of th

132-02 201820/0eh -1459489-dt-content-rid-13598452 7courses/CHEM 17. Which of the following represents the equation for a first-order half-life? A. t12 KAlo 0.693 B. t1/2 = [A C. …

1320 mol per second of a liquid mix containing 50.0 mol % benzene and the balanc

1320 mol per second of a liquid mix containing 50.0 mol % benzene and the balance toluene placed in an evacuated sealed container initially at 25 degrees C. It's then heated to 95…

133.3) is added to 100.0 g of water. Find the molality of la.) 13.33 g of AlCl,

133.3) is added to 100.0 g of water. Find the molality of la.) 13.33 g of AlCl, (Mw (8) the solution. (8) b.) Find the freezing point of this solution. Kr of H2O 1.86 oc. Hint: Re…

135 Marks] Q 3(b) Kinetic resolution can be used to separate enantiomers. This r

135 Marks] Q 3(b) Kinetic resolution can be used to separate enantiomers. This relies on chemical conversion of the compound, in which one enantiomer reacts at a much higher rate …

135 Marks] Q 3(b) Kinetic resolution can be used to separate enantiomers. This r

135 Marks] Q 3(b) Kinetic resolution can be used to separate enantiomers. This relies on chemical conversion of the compound, in which one enantiomer reacts at a much higher rate …

137 145- TABLE 70.4 Amides 149 199 imp Name of Compund mp Name of Compound 180.

137 145- TABLE 70.4 Amides 149 199 imp Name of Compund mp Name of Compound 180. :84 NN Denethy formamide 127-129 lsc butyramide 4-166 NN-Dimethylacetamide 123-129 Benzamide 196 79…

138 ChemActivity 16 Spectroscopy Model 2: Infrared Spectroscopy Most bonds of in

138 ChemActivity 16 Spectroscopy Model 2: Infrared Spectroscopy Most bonds of interest to organic chemists are excited by (and absorb) light in the infrared (IR) region of the ele…

14 -11. Provide the correct term for the given definiton. (0 marks) Degenerate o

14 -11. Provide the correct term for the given definiton. (0 marks) Degenerate orbitals formed rom atomic orbitals in their excited state. he mixing of The negative of the energy …

14 . Alkalinity of water a-is caused by Ca\"and Mg\" b- depends only on carbonat

14 . Alkalinity of water a-is caused by Ca"and Mg" b- depends only on carbonates, bicarbonates and H c- is the acid-neutralizing capacity of water d- is a priority pollutant e- al…

14 . Alkalinity of water a-is caused by Ca\"and Mg\" b- depends only on carbonat

14 . Alkalinity of water a-is caused by Ca"and Mg" b- depends only on carbonates, bicarbonates and H c- is the acid-neutralizing capacity of water d- is a priority pollutant e- al…

14 A Date: Course/Section: Instructor Student name: Team members: Oxidation-Redu

14 A Date: Course/Section: Instructor Student name: Team members: Oxidation-Reduction Reactions Prelaboratory Assignment 1. Define the following terms: a. Oxidation-e oss of cletr…

14 An unknown mass of each of the following substances, initially at 21.0 C, abs

14 An unknown mass of each of the following substances, initially at 21.0 C, absorbs 1950 J of heat. The final temperature is recorded as indicated. Find the mass of each substanc…

14 April Dibenzyl Ketone Report Question 3 Not yet answered Marked out of 1.0000

14 April Dibenzyl Ketone Report Question 3 Not yet answered Marked out of 1.00000 With the advent of photosynthesis, the amount of oxygen in the atmosphere has varied over the eon…

14 IMPORTANT!! When entering your answer in scientific notation you must use the

14 IMPORTANT!! When entering your answer in scientific notation you must use the "e". Example: for 1 times 10-3, you enter 1e-3 or 1e-03. (a) The Ksp of Cu(OH)2 is 4.8 times 10-20…

14 Report Shee Bask Laboratory Techniques Volume delivered by 10 mL 1.1455 pipet

14 Report Shee Bask Laboratory Techniques Volume delivered by 10 mL 1.1455 pipet (show calculations) 1.363 m 9,9 Mean volume delivered by 10 mL pipet (show calculations) 105 --mL …

14 TECH0701: Meaburing the Melring Points of Compounds and Mists (0 what occurre

14 TECH0701: Meaburing the Melring Points of Compounds and Mists (0 what occurred when crystals began to disappear from the bottom of the capillary tube rather than turning to a l…

14 TECH0701: Meaburing the Melring Points of Compounds and Mists (0 what occurre

14 TECH0701: Meaburing the Melring Points of Compounds and Mists (0 what occurred when crystals began to disappear from the bottom of the capillary tube rather than turning to a l…