Chemistry concepts and calculations

1. (4 points) The value of K for the gaseous reaction CO + H2O CO2 + H2 is 0.1.

1. (4 points) The value of K for the gaseous reaction CO + H2O CO2 + H2 is 0.1. Which one of the following statements concerning the relative concentrations of substances must alw…

1. (4 points) You use a P20 micropipette to transfer 20 1 of water to a microcen

1. (4 points) You use a P20 micropipette to transfer 20 1 of water to a microcentrifuge tube Next you use a P200 to add 20011 of dye to the same tube. Finally, you use a P1000 set…

1. (4 pts) In your notes, you were given the experimental value for the chair-ch

1. (4 pts) In your notes, you were given the experimental value for the chair-chair interconversion of trans-1,2- dimethylcylcohexane (i.e. AG2.50 kcal/mol), and you know from you…

1. (5 pts) Stock solution B is made in dimethylsulfoxide (DMSO) instead of water

1. (5 pts) Stock solution B is made in dimethylsulfoxide (DMSO) instead of water. Why do you suppose this is the case? 2. (5 pts) Do acidic or basic conditions facilitate our expe…

1. (5 pts) Stock solution B is made in dimethylsulfoxide (DMSO) instead of water

1. (5 pts) Stock solution B is made in dimethylsulfoxide (DMSO) instead of water. Why do you suppose this is the case? 2. (5 pts) Do acidic or basic conditions facilitate our expe…

1. (5 pts) Which of the following substances is the best reducing agent? Briefly

1. (5 pts) Which of the following substances is the best reducing agent? Briefly explain your answer c) Li+ a) Ag b) Zn d) Ag e) Al 2. (5 pts) Which of the following substances is…

1. (5 pts.) If an object, lens, and screen are positioned so that a real image i

1. (5 pts.) If an object, lens, and screen are positioned so that a real image is formed on the screen, how will the image change if half of the lens is covered by a piece of pape…

1. (5) From today\'s experiment, Sarah measured and recorded the following data:

1. (5) From today's experiment, Sarah measured and recorded the following data: Barometric Pressure = 0.995 atmosphere; Boiling point of H2O = 99.8°C mass of flask+ septum: 98.324…

1. (5) Solid Fe reacts with aqueous sulfuric acid (H2SO4) to form aqueous iron (

1. (5) Solid Fe reacts with aqueous sulfuric acid (H2SO4) to form aqueous iron (III) sulfate and hydrogen gas. Write out and balance the chemical equation, including phases. 2. (5…

1. (50 pts.) For each reaction below: i. Predict both Potential products ii. Bal

1. (50 pts.) For each reaction below: i. Predict both Potential products ii. Balance the equation. iii. Will the reaction Occur? HI(aq) + KHCO3(aq) - > Na2CO3 (aq) + Al2(SO4)3(…

1. (6 points) Chloride ion is determined by a potentiometric titration using 0.2

1. (6 points) Chloride ion is determined by a potentiometric titration using 0.200 M AgNO, as t titrant. AgClI (s) is formed during the titration by the following reaction: Ag, (a…

1. (6 points) Chloride ion is determined by a potentiometric titration using 0.2

1. (6 points) Chloride ion is determined by a potentiometric titration using 0.200 M AgNO, as the titrant. AgCI (s) is formed during the titration by the following reaction: Ag (a…

1. (6 points) Which material w you choose for da) a crank shaft of an internal c

1. (6 points) Which material w you choose for da) a crank shaft of an internal combustion engine, rotor blade and (c a complex housing of cheap DVD player? Give reasons for yo dec…

1. (6 points) Which of the following acids is the stronger acid? b) AsHs or Sblt

1. (6 points) Which of the following acids is the stronger acid? b) AsHs or Sblt cCB CH COOH or ClCH COOH 2. (10 points) Name the following compounds. Predict whether their aqueou…

1. (6 points) Write a balanced net ionic equation for the reaction step involvin

1. (6 points) Write a balanced net ionic equation for the reaction step involving the precipitation of aluminum hydroxide. Start with a balanced chemical equation for this step re…

1. (6 pts) H202 decomposes to H30 and O in a reaction tse of a sample constant i

1. (6 pts) H202 decomposes to H30 and O in a reaction tse of a sample constant is 1.06 X 103 min. How long will it take for 15 a reaction that is first order in H202. The rate 2. …

1. (6 pts.) Fill in the following blanks in English with appropriate unabbreviat

1. (6 pts.) Fill in the following blanks in English with appropriate unabbreviated terms used in thermodynamics: ] describes the entropy change accompanying any physical or chemic…

1. (6 pts.) Fill in the following blanks in English with appropriate unabbreviat

1. (6 pts.) Fill in the following blanks in English with appropriate unabbreviated terms used in thermodynamics: ] describes the entropy change accompanying any physical or chemic…

1. (8 points) In studies trying to understand the regulation of hormone-sensitiv

1. (8 points) In studies trying to understand the regulation of hormone-sensitive adenylate cyclase, it was discovered that non-hydrolyzable GTP analogs and cholera toxin (that in…

1. (8 points) The following reaction is important for photosynthesis in green pl

1. (8 points) The following reaction is important for photosynthesis in green plants:CO2  + ribulose diphosphate W  2 phosphoglycerate GE  = !52 kJ/mol CO2 Calculate the value of …

1. (8 pts) Your textbook suggest that 1 - butanol is protonated by HBr whish is

1. (8 pts) Your textbook suggest that 1 - butanol is protonated by HBr whish is created in situ as shown in the equation below .(4pts) a. The reaction shown above is not accurate …

1. (A) Find the de Broglie wavelength (in nm) associated with an electron that i

1. (A) Find the de Broglie wavelength (in nm) associated with an electron that is moving with a velocity of 2310 km/s. The electron rest mass is 9.11 x 10-31 kg. Note, electrons h…

1. (TCO 1) A disk drive _____ governs the communication from a motherboard to a

1. (TCO 1) A disk drive _____ governs the communication from a motherboard to a disk drive and vice versa. (Points : 5)        regulator        manager        interface        map…

1. (TCO 1) A switch receives a frame from PC-A to PC-B. Both PCs are on the same

1. (TCO 1) A switch receives a frame from PC-A to PC-B. Both PCs are on the same VLAN. The MAC Address of PC-A is not yet registered in the switch MAC Address Table. Where will th…

1. (TCO 2) The Panel server control encapsulates a set of controls. Which of the

1. (TCO 2) The Panel server control encapsulates a set of controls. Which of the following is true about the Panel control? (Points : 2)        It allows you to take a group of se…

1. (TCO 2) Which of the following is not an example of a poor security practice?

1. (TCO 2) Which of the following is not an example of a poor security practice? (Points : 3)        The user does not follow established security policies or processes.        Th…

1. (TCO 3) All of the following are reasons to use Master Pages except : (Points

1. (TCO 3) All of the following are reasons to use Master Pages except: (Points : 4)        it facilitates designing and using common elements that are used throughout the applica…

1. (TCO 4) A chemist found a bottle of an unknown concentration of HCl solution

1. (TCO 4) A chemist found a bottle of an unknown concentration of HCl solution sitting on the shelf in the lab. She found that the pH was 2.0. (a) Is the solution an acid or a ba…

1. (TCO 4) Molly needs to make 1 liter of a 1.5 M glucose solution for use in an

1. (TCO 4) Molly needs to make 1 liter of a 1.5 M glucose solution for use in an experiment. The molar mass of glucose is 180.16 g/mol. (a) What is the solute in the resulting sol…

1. (TCO 4) Which of the following is not correct when considering state manageme

1. (TCO 4) Which of the following is not correct when considering state management in ASP.NET Web applications? (Points : 3)        State management can be done at both client sid…

1. (TCO 5) Which piece of pseudocode represents updating the loop control variab

1. (TCO 5) Which piece of pseudocode represents updating the loop control variable?       rep = 1        rep = rep + 1        while rep < 5        print rep Question 2. 2. (TCO…

1. (TCO 6) Match the information to the command that is used to obtain the infor

1. (TCO 6) Match the information to the command that is used to obtain the information. Potential Matches: 1 : 192.168.10.30 255.255.255.240 2 : 192.168.1.129 255.255.255.192 3 : …

1. (TCO 6) Which of the following objects are used to populate a DataSet object

1. (TCO 6) Which of the following objects are used to populate a DataSet object with data from a table in a SQL Server database? (Points : 3)        SqlCommnad, SqlConnection, Ole…

1. (TCO 7) (a) Given that the molar mass of H 3 PO 4 is 97.994 grams/mol , deter

1. (TCO 7) (a) Given that the molar mass of H3PO4 is 97.994 grams/mol , determine the number of grams of H3PO4 needed to prepare 0.75 L of a 0.25 M H3PO4 solution. Show your work.…

1. (TCO 9) _____ memory may be logically carved out of space on the hard drive f

1. (TCO 9) _____ memory may be logically carved out of space on the hard drive for temporary use. (Points : 3)        Virtual        Logical        Physical        Hierarchical Qu…

1. (TCO A) Based on the examples in the text, if you were asked to formulate a p

1. (TCO A) Based on the examples in the text, if you were asked to formulate a plan for a regional drive-in restaurant chain's efforts to use information technology to attract cus…

1. (This problem is similar to Problem 5-2 in McQuarrie and Simon) Make the \"ha

1. (This problem is similar to Problem 5-2 in McQuarrie and Simon) Make the "harmonic approximation" to the following diatomic potential energy function to obtain the correspondin…

1. (a) Are bromobenzene and methyl benzoate solids or liquids? (b) What is the d

1. (a) Are bromobenzene and methyl benzoate solids or liquids?      (b) What is the density of the liquid(s)?    (c) What are the molecular weights of bromobenzene and methyl benz…

1. (a) IN YOUR OWN WORDS, explain how Hess\' Law (of constant heat summation) ap

1. (a) IN YOUR OWN WORDS, explain how Hess' Law (of constant heat summation) applies to the 3 chemical reactions that will be studied in this experiment. (Note: answers copied fro…

1. (a) In two sentences explain the difference between valence bond theory and m

1. (a) In two sentences explain the difference between valence bond theory and molecular orbital theory? (b) Draw the three most important resonance structures for the CH and OH b…

1. (a) What horizontal force T:must be applied to pull the supporting rope aside

1. (a) What horizontal force T:must be applied to pull the supporting rope aside until the angle at the wall will be 45 degrees as shown (b) Find T T1 T2 2. A car moving at 30m/s …

1. (a) Why do open tubular columns provide greater resolution than packed column

1. (a) Why do open tubular columns provide greater resolution than packed columns in gas chromatography? (b) How can you improve resolution between two closely spaced peaks in gas…

1. (a) Would the TLC analysis still work for all unknown drugs if you changed th

1. (a) Would the TLC analysis still work for all unknown drugs if you changed the stationary phase from silica to a C-18 hydrocarbon chain? Why or why not? (b) If it would still w…

1. (a) Write balanced molecular equations for the following potential precipitat

1. (a) Write balanced molecular equations for the following potential precipitation reactions. Indicate the states of reactants and products [(aq) or (s)]. (b) In those cases wher…

1. (a) for the formation of 1 mol of liquid water, H 2 (g) + 1/2 O 2 (g) -------

1. (a) for the formation of 1 mol of liquid water, H2 (g) + 1/2 O2 (g) ---------------> H2O (l) , deltaH = - 572 / 2 = - 286 kJ/mol (b) For the dissociation of water, H2O (l) -…

1. (a). What are the pH and the percent ionization of an aqueous 0.100 M methano

1. (a). What are the pH and the percent ionization of an aqueous 0.100 M methanoic acid, HC(O)OH(aq), solution? Explain your reasoning. Note: Ka = 1.8 x 10-4 for methanoic acid. (…

1. (i) Select the reagent system you\'re going to get to start the synthesis of

1. (i) Select the reagent system you're going to get to start the synthesis of the alkyne hept-2-yne. Starting material is ethyne. sodium hydroxide in water sodium hydroxide in et…

1. (linenumbers.py) Write a program that asks the user for the name of the file.

1. (linenumbers.py) Write a program that asks the user for the name of the file. The program should write the contents of this input file to an output file. In the output file, ea…

1. (standard) Convert the following numbers from 8-bit two\'s complement to deci

1. (standard) Convert the following numbers from 8-bit two's complement to decimal: (a). 11111001, (b). 01011000. 2. (standard) Convert the following decimal numbers to 4-bit two'…

1. ) A catalyst speeds up a chemical reaction by a. shifting the equilibrium. b.

1. ) A catalyst speeds up a chemical reaction by a. shifting the equilibrium. b. increasing the activation energy. c. decreasing the reaction enthalpy. d. providing an alternate r…