Chemistry concepts and calculations

8) It was found that a new substance extracted from a tree in Neverland, compoun

8) It was found that a new substance extracted from a tree in Neverland, compound K, had (2pts) strong antibacterial activity against staphylococcus aureus. It was found that a 2.…

8) Ksp for Ca5(PO4)3OH = [Ca2+]^5.[PO4^3-]^3.[OH-] pH = 7 [OH-] = 1 x 10^-7 M so

8) Ksp for Ca5(PO4)3OH = [Ca2+]^5.[PO4^3-]^3.[OH-] pH = 7 [OH-] = 1 x 10^-7 M solubility = 5.5 x 10^-5 M So, Ksp = (5 x 5.5 x 10^-5)^5.(3 x 5.5 x 10^-5)^3.(1.0 x 10^-7)        = 7…

8) Potassium and hydrogen react to form the ionic compound potassium hydride. (a

8) Potassium and hydrogen react to form the ionic compound potassium hydride. (a) Write a balanced equation for this re- action. (b) Use data in Figures 7.10 and 7.12 to determine…

8) The addition of fluoride to many public water systems is done to help fight c

8) The addition of fluoride to many public water systems is done to help fight cavities in a city's population. Given 8) that a 500 mL sample of hard water contains 2.5x 10 MCa io…

8) The basaltic dike in the above figure is ~ 1 Ma. Which radiometric dating tec

8) The basaltic dike in the above figure is ~ 1 Ma. Which radiometric dating technique technique would you use to estimate an age for the dike? A. Rb-Sr B. K-Ar or Ar-Ar C. Sm-Nd …

8) The best Lewis structure of SF4 shows that the central sualfur atom has bondi

8) The best Lewis structure of SF4 shows that the central sualfur atom has bonding electron pairs. nonbonding and A) 4.0 B) 0.4 C) 4.1 D) 0,5 E)L.4 9) The molecular geometry of th…

8) The effect of surface tension is observable as bubbles, i.e., liquid in the s

8) The effect of surface tension is observable as bubbles, i.e., liquid in the shape of a hollow sphere can minimize its surface area, and hence its free energy, by contracting. W…

8) The enthalpy change for the following reaction is -483.6 k: 2H2 (g) + O2 (g)

8) The enthalpy change for the following reaction is -483.6 k: 2H2 (g) + O2 (g) 2H2O (g) Therefore, the enthalpy change for the following reaction isk kJ: 4H2 (g) + 202 (g) 4H2O (…

8) The figure below shows a block with mass M1 20 kg, sitting on an incline plan

8) The figure below shows a block with mass M1 20 kg, sitting on an incline plane that makes a 30 degree angle with the horizontal. The mass M1 is attached to a light cord that ru…

8) The following reactions can be coupled to give alanine and oxaloacetate: glut

8) The following reactions can be coupled to give alanine and oxaloacetate: glutamate + pyruvateketoglutarate + alanine glutamate + oxaloacetate ketoglutarate + aspartate 6,03 =-1…

8) To tube 6, add slowly 10 drops of water and place the test tube in a beaker o

8) To tube 6, add slowly 10 drops of water and place the test tube in a beaker of ice. After 10 minutes, record the color you observe in tube 6 and any change in color. Questions …

8) We can adjust the pH of a buffer, within limits, to bring it to some desired

8) We can adjust the pH of a buffer, within limits, to bring it to some desired value. For example, if Ka for the acid is 1.0 X10 and the amounts of acid and conjugate base are eq…

8) When 0.500 mol of CH3COOH is combined with enough water to make a 300.0 mL so

8) When 0.500 mol of CH3COOH is combined with enough water to make a 300.0 mL solution, the concentration of CH3COOH is __________ M. A) 3.33 B) 1.67 C) 0.835 D) 0.150 9) In a tit…

8) Which of the following is the correct IUPAC name of the carboxylic acid which

8) Which of the following is the correct IUPAC name of the carboxylic acid which contains three carbon atoms? Question 8 options: a) 1-propionic acid b) 1-propanoic acid c) propio…

8) Which one of the following compounds behaves as an acid when dissolved in wat

8) Which one of the following compounds behaves as an acid when dissolved in water? 8) A) C4H10 B) RaO C) HI D) RbOH 9) What is the molarity of a potassium triodide solution, KI3(…

8) Your laboratory has received a contract from the No More Trash Recycling comp

8) Your laboratory has received a contract from the No More Trash Recycling company to analyze the incoming plastics from local recycling centers. In order for the plastic recycli…

8). Consider the equilibrium in the for the following reaction 302(g) 203(g) Ass

8). Consider the equilibrium in the for the following reaction 302(g) 203(g) Assume that ??.is independent of temperature a. Without doing a calculation, predict whether the equil…

8)At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO an

8)At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When eq…

8, Click Stop when you have finished poinr that volume when the 9. Examine the d

8, Click Stop when you have finished poinr that volume when the 9. Examine the data on the graph to find the graph to examine the data. As you conductivity value reaches a minimum…

8, Determine the formal charge on the carbon atom of carbon monoxide with this L

8, Determine the formal charge on the carbon atom of carbon monoxide with this Lewis structure :co: a. 0 b.+1 19. Classify the bondin this structure of an oxygen molecule, 030 a. …

8, If the reference caffeine solution were made by dissolving caffeine in dichlo

8, If the reference caffeine solution were made by dissolving caffeine in dichloromethane rather than methanol, how would this affect the Rf for caffeine? Explain. 9. Compound X h…

8, If the reference caffeine solution were made by dissolving caffeine in dichlo

8, If the reference caffeine solution were made by dissolving caffeine in dichloromethane rather than methanol, how would this affect the Rf for caffeine? Explain. 9. Compound X h…

8- The relationship of the following two molecules is best described by CH3 CH3

8- The relationship of the following two molecules is best described by CH3 CH3 (A) structural isomers (B) geometric isomers (C) not isomers (D) conformational isomers 9- The rela…

8- Wh ich of the following methyl groups will have the most downfield signal? I

8- Wh ich of the following methyl groups will have the most downfield signal? I 9. In an NMR spectrum, the molecule propane will exhibit how many different types of e) eight 10. I…

8- trace elements in the teeth of archeological speciment provides anthropologis

8- trace elements in the teeth of archeological speciment provides anthropologists with clus about the dite and diseases of ancient people . Porter et al (20020 measured the trace…

8-1 Discussion: Java Life Rap This is very odds. I don\'t know if you guys could

8-1 Discussion: Java Life Rap This is very odds. I don't know if you guys could do this. (myself have no talent in music and especial rap music) My Java instructor asked the class…

8-100 What is the osmolarity of each of the following solutions? a. 1.0 M KNO, b

8-100 What is the osmolarity of each of the following solutions? a. 1.0 M KNO, b. 1.0 M K SO c. 1.0 M in both KNO, and Na,SO d. 1.0 M in both KNO, and glucose 8-101 Classify each …

8-4 Computer Programming please help write a Java program in response to the fol

8-4 Computer Programming please help write a Java program in response to the following prompt: Design and implement the class Day that implements the day of the week in a program.…

8-4 Computer Programming: pleas write a java program in response to the followin

8-4 Computer Programming: pleas write a java program in response to the following prompt: Design and implement the class Day that implements the day of the week in a program. The …

8. (10 points) Computational problem solving: Proving correctness: Complete the

8. (10 points) Computational problem solving: Proving correctness: Complete the proof by contradiction this algorithm to compute the Fibonacci numbers is correct. function fib(n) …

8. (10 pts) Match the term with the proper description (add t (a) Enzyme 1. Subs

8. (10 pts) Match the term with the proper description (add t (a) Enzyme 1. Substrate concentration (b) Kinetics (c) Michaelis-Menten that yields 1 /2 Vmax 2. k2 or kcat 3. Respon…

8. (10 pts) Methanol can be synthesized by combining carbon monoxide and hydroge

8. (10 pts) Methanol can be synthesized by combining carbon monoxide and hydrogen a elevated temperature. CO(g) + 2H2(g) t; CHOH(g) ??%--90.7 kJ (exothermic) A3.0-L reaction vesse…

8. (14 points) Consider the IR spectra and the structures below For each structu

8. (14 points) Consider the IR spectra and the structures below For each structure: predict the key IR vibrations in wavenumbers. One or more vibration may be present. Match the c…

8. (20 points) A blood-volume determination was carried out on a patient by inje

8. (20 points) A blood-volume determination was carried out on a patient by injection with 20 mL of blood that had been radioactively labeled with 51 Cr to an activity of 4.10 Ci/…

8. (21 pts total) You are making a bowl of 500 g of broth for a sick kid, and ne

8. (21 pts total) You are making a bowl of 500 g of broth for a sick kid, and need to cool it down for them to a final temperature of 65 °C. You place a 35 g ice cube initially at…

8. (3 points) Which molecule below is the strongest acid? HO CH, Br 9 (4 points)

8. (3 points) Which molecule below is the strongest acid? HO CH, Br 9 (4 points) Arrange the following butane formations in order of internal energy with the con highest energy co…

8. (3 points)Phosgene, COCl2 is formed from the reaction of carbon monoxide and

8. (3 points)Phosgene, COCl2 is formed from the reaction of carbon monoxide and chlorine gas. Determine the rate law after an initial buildup period has passed, assuming the follo…

8. (3 pts) Complete the reaction below between methyl salicylate, a fragrant com

8. (3 pts) Complete the reaction below between methyl salicylate, a fragrant component in oil of wintergreen, and sodium hydroxide. H20 HCI NaOH obeained when 12.95 mL of methyl s…

8. (5 points) Consider two aqueous solutions of nitrous acid (H NO2). Solution A

8. (5 points) Consider two aqueous solutions of nitrous acid (H NO2). Solution A has a concentration of [H NO2] = 0.55 M, and Solution B has a concentration of [H NO2] = 1.25 M. W…

8. (5 points) Write a function alternates (1st) that returns True if the list of

8. (5 points) Write a function alternates (1st) that returns True if the list of integers 1st alternates between even and odd numbers (either [even, odd, even, odd, or [odd, even,…

8. (5 pts) Write the oxidation state for the underlined element in the box follo

8. (5 pts) Write the oxidation state for the underlined element in the box following each compound. a) NaCIO.2 b) K3PO4 c) H202 d) HNO3 e) NaCN 9. (5 pts) a) A Pb(NO3)2 solution c…

8. (6 pts) You wish to determine the hormone-binding specificity of a newly iden

8. (6 pts) You wish to determine the hormone-binding specificity of a newly identified membrane receptor. Three different hormones, X, Y, and Z, were mixed with the receptor in se…

8. (a) Which conjugate acid-base pair is the best choice to [ make a buffer at p

8. (a) Which conjugate acid-base pair is the best choice to [ make a buffer at pH 7.4 according to the Ka table on CH.COOH the right? Acid Ka 1.8× 1 7.1×1 6.3 × 10 CalliN:04s 3.3x…

8. 10 g of a compound with logP of 0.48 is dissolved in 150 mL of water. To the

8. 10 g of a compound with logP of 0.48 is dissolved in 150 mL of water. To the nearest gram, how much compound is extracted into 200 mL of octan-1-ol from the aqueous solution wh…

8. 10 points. Which of the following molecules would you expect to be the most p

8. 10 points. Which of the following molecules would you expect to be the most polar ? The least? Why? Br Br H Br CEC Br H 9. 10 points. Considering that sulfur is in the same che…

8. 10/20 points | Previous Answers My Notes Consider the following equilibrium:

8. 10/20 points | Previous Answers My Notes Consider the following equilibrium: 2NOBr(g) -2N0(g) + Br2(g) An equilibrium mixture is 0.104 M NOBr, 0.399 M NO, and 0.204 M Br2 a) Wh…

8. 20.00 ml of a reagent are dispensed using a 10.00 mL Class A pipet with a pub

8. 20.00 ml of a reagent are dispensed using a 10.00 mL Class A pipet with a published uncertainty of 10.00 + - 0.02 mL. Interestingly, when the pipet was calibrated ten times, it…

8. A 0.1000 g sample of grain alcohol, known to contain only carbon, hydrogen an

8. A 0.1000 g sample of grain alcohol, known to contain only carbon, hydrogen and oxygen, was allowed react completely with oxygen to form products CO2 and H20. These products wer…

8. A 25.00 mL sample of unknown containing Fe3+ and Cu2+ required 16.06 mL of 0.

8. A 25.00 mL sample of unknown containing Fe3+ and Cu2+ required 16.06 mL of 0.05083 M EDTA for complete titration. A 50.00 mL sample of the unknown was treated with NH4F to prot…

8. A Panamax Oil Tanker can transport 500,000 barrels of crude oil per trip. The

8. A Panamax Oil Tanker can transport 500,000 barrels of crude oil per trip. The average gasoline tank truck can transport 10,000 gallons of gasoline. If it takes 5 tons of crude …