Chemistry concepts and calculations

4. Redox titrations. a. (1 pt) Explain how a redox indicator works. Why is it im

4. Redox titrations. a. (1 pt) Explain how a redox indicator works. Why is it important to consider the standard reduction potential of the indicator-what happens if it is more ea…

4. Redox titrations. a. (1 pt) Explain how a redox indicator works. Why is it im

4. Redox titrations. a. (1 pt) Explain how a redox indicator works. Why is it important to consider the standard reduction potential of the indicator-what happens if it is more ea…

4. Rod Bagley was co-inventor of the catalytic converter along with two other en

4. Rod Bagley was co-inventor of the catalytic converter along with two other engineers at Corning. The catalytic converter converts 95% of exhaust pollutants into more benign emi…

4. Sarah can study 20 pages per night. Each page has three homework problems. If

4. Sarah can study 20 pages per night. Each page has three homework problems. If she studies for 3 nights how many homework problems will she do? **Write out the relevant conversi…

4. Sarah can study 20 pages per night. Each page has three homework problems. If

4. Sarah can study 20 pages per night. Each page has three homework problems. If she studies for 3 nights how many homework problems will she do? **Write out the relevant conversi…

4. Select the true statement concerning the addition reaction between chlorine a

4. Select the true statement concerning the addition reaction between chlorine and 4- ethylcyclopentene (in dichloromethane) a. the addition is syn, and the mechanism involves a c…

4. Smart-asa Gnome JusTy craves the smell of moth balls (it?s why his socks neve

4. Smart-asa Gnome JusTy craves the smell of moth balls (it?s why his socks never ever have holes). He obtains the cooling curve for pure paradichlorbenzene (PDB) and determines i…

4. Solubility Rules and Precipitation Reactions. Imagine you have a solution con

4. Solubility Rules and Precipitation Reactions. Imagine you have a solution containing a mixture of Mg2. (aq), ???. (aq), Ag. (aa) and Nor (aq) dissolved in the solution. You hav…

4. Steady state open system throttle valve (20 marks) Valves on steam lines are

4. Steady state open system throttle valve (20 marks) Valves on steam lines are commonly encountered and you should know how they work. For most valves, the change in velocity of …

4. Substance A decomposes according to the reaction: 0.200 mole of the substance

4. Substance A decomposes according to the reaction: 0.200 mole of the substance A is added to a 400-ml evacuated container at 50 C. Some of the material was removed every 2.50 mi…

4. Substances A, B, C can all act as oxidizing agents. In solution, A is green,

4. Substances A, B, C can all act as oxidizing agents. In solution, A is green, B is red, and C is yellow. I C ions, al ions, the color remains red. n the reactions in which they …

4. Superalloys are state-of-the-art metals used in engineering. One family of su

4. Superalloys are state-of-the-art metals used in engineering. One family of superalloys areknown as Inconel alloys that are based on nickel and chromium. They are used primarily…

4. Suppose a solution was too concentrated for an accurate reading with the colo

4. Suppose a solution was too concentrated for an accurate reading with the colorimeter. The concentrated solution was diluted by placing 1.00 mL of the concentrated solution in 4…

4. Suppose a solution was too concentrated for an accurate reading with the colo

4. Suppose a solution was too concentrated for an accurate reading with the colorimeter. The concentrated solution was diluted by placing 1.00 mL of the concentrated solution in 4…

4. Suppose in Part C that a student ignores the direction in Step 9 to measure t

4. Suppose in Part C that a student ignores the direction in Step 9 to measure the boiling point as soon as the mixture boils steadily. As a result, a significant amount of the so…

4. Suppose the total pressure in a bottle of soda water before it is opened is 3

4. Suppose the total pressure in a bottle of soda water before it is opened is 35 psig and that the gas mixture is 75% CO2 and 25% other gases. The temperature is 5°C. The Henry's…

4. Suppose the total pressure in a bottle of soda water before it is opened is 3

4. Suppose the total pressure in a bottle of soda water before it is opened is 35 psig and that the gas mixture is 75% CO2 and 25% other gases. The temperature is 5°C. The Henry's…

4. Suppose users share a 2 Mbps link. Also suppose each user requires 200 kbps w

4. Suppose users share a 2 Mbps link. Also suppose each user requires 200 kbps when transmitting, but each user transmits only 10 percent of the time. (See the discussion of stati…

4. Suppose you record the run times of program P. You find out that on inputs of

4. Suppose you record the run times of program P. You find out that on inputs of length 1, its run time is always 1/8 second, and on inputs of length 10, its run time is always 1/…

4. Suppose you want to set the double variable oneToThree to a random real numbe

4. Suppose you want to set the double variable oneToThree to a random real number uniformly distributed in the interval [1.0, 3.0). You have made the following declaration: Random…

4. Suppose you were given a test tube that might have a mixture of bath CI and C

4. Suppose you were given a test tube that might have a mixture of bath CI and Co,. 4. Suppose you were given a test tube that might have a mixture of both Cr and COs. If you adde…

4. Technicians A and B work in an LPG (liquefied petroleum gas) filling station.

4. Technicians A and B work in an LPG (liquefied petroleum gas) filling station. They mostly deal with butane and propane with the vapor pressure of 2.2 atm and 10.1 atm, respecti…

4. TemperatureDependencies 180 Understanding the high-temperature behavior of ni

4. TemperatureDependencies 180 Understanding the high-temperature behavior of nitrogen oxides isessential for controlling pollution generated in automobileengines. The decompositi…

4. The Cy1 methyl protons of Val94 in folded T4 lysozyme have a chemical shift o

4. The Cy1 methyl protons of Val94 in folded T4 lysozyme have a chemical shift of-0.8 ppm. In the unfolded protein, they have a chemical shift of +0.9 ppm, close to the chemical s…

4. The K-concentration in the silicate portion of the Earth (mantle+crust) is ab

4. The K-concentration in the silicate portion of the Earth (mantle+crust) is about 260 ppm. The mass of silicate Earth is 4X10 gram. The total mass of Ar in the atmosphere s 1.68…

4. The P-T phase diagram of water is shown below: critical point 220 Solid (Ice)

4. The P-T phase diagram of water is shown below: critical point 220 Solid (Ice) Liquid Protein solution 1.0 Gas (water vapor) e 0.006 0.005 Triple point 0.001 273 298 587 T (K) a…

4. The \"shorthand\" electron configuration for bromine, atomic number 35, can b

4. The "shorthand" electron configuration for bromine, atomic number 35, can be written as. b. [Krj4s24p 3d10 c. [Arj4s23d14p d. [Arj4s24p5 e. None of the above 5. For the row on …

4. The abundance of water in the cells and tissues helps to minimize temperature

4. The abundance of water in the cells and tissues helps to minimize temperature fluctuations. This due to what property of water? 1. Density 2. Viscosity …

4. The amount of camphor in an analgesic ointment is determined by GC using the

4. The amount of camphor in an analgesic ointment is determined by GC using the method of internal standards. A standard sample is prepared by placing 45.2 mg of camphor and 2.00 …

4. The boiling point for species A at 1 bar is reported to be 250 K, and you des

4. The boiling point for species A at 1 bar is reported to be 250 K, and you desire to know the boiling point at 10 bar. Knowing the enthalpy of vaporization, you apply the Clausi…

4. The boiling point for species A at 1 bar is reported to be 250 K, and you des

4. The boiling point for species A at 1 bar is reported to be 250 K, and you desire to know the boiling point at 10 bar. Knowing the enthalpy of vaporization, you apply the Clausi…

4. The chemical and physical sunscreens have been found to damage coral reefs, w

4. The chemical and physical sunscreens have been found to damage coral reefs, while others may be linked to health problems. Another issue is that they are made from petroleum fe…

4. The correct trend for the first ionization energy would be, C) K < Al < Mg

4. The correct trend for the first ionization energy would be, C) K < Al < Mg < N K can readily loose its lone valence electron to reach noble gas stable configuration. A…

4. The covalent bond with the greatest polarity would form in which of the atom

4. The covalent bond with the greatest polarity would form in which of the atom pairs below? A) Br-Br c) C-P 5 5, Use the Born-Haber cycle to calculate the lattice energy of MgO (…

4. The dissolution of barium hydroxide in water is an exothermic process. Which

4. The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct? A) Theenthalpyofsolidbariumhydroxidepluspurewaterislessthan…

4. The equation representiag the reaction used for the commercial preparation of

4. The equation representiag the reaction used for the commercial preparation of hydrogen cyanide is 2CH4 + 30; +2NH,- 2 HCN + 6H20 Based on this equation, which of the following …

4. The factorial of a number, N, is defined as follows: N! 1 * 2 * 3 * 4 *. . .

4. The factorial of a number, N, is defined as follows: N! 1 * 2 * 3 * 4 *. . . . . * N Forexample,4! 4 * 3 * 2 * land 7! = 7 * 6 * 5 * 4 * 3 * 2 * 1 Create a web page that allows…

4. The following information is a summary of data produced by the automatic syst

4. The following information is a summary of data produced by the automatic system used to measure Ksat in laboratory 3. Calculate Kat for each of the periods with a discharge val…

4. The following transitions in the hydrogen atom invalve emitting energy as lig

4. The following transitions in the hydrogen atom invalve emitting energy as light. [Where ni and m or n2 are the two different Principle quantum numbers.] Rank them in order of i…

4. The following transitions in the hydrogen atom involve emitting energy as lig

4. The following transitions in the hydrogen atom involve emitting energy as light. [Where ni and m or na are the two different Principle quantum numbers.] Rank them in order of i…

4. The following two step mechanism has been proposed for the reaction: Overall:

4. The following two step mechanism has been proposed for the reaction: Overall: 2 NO(g) + H2(g) ? N2O(g) + H2O(g) 1st step: NO(g) + NO(g)…

4. The graph below shows the partial pressure of one component of a binary mixtu

4. The graph below shows the partial pressure of one component of a binary mixture as a function of its mole fraction (in the solution). a) Does the graph show component 1 or comp…

4. The kinetics of an enzyme are measured as a function of substrate concentrati

4. The kinetics of an enzyme are measured as a function of substrate concentration in the presence and absence of 100 uM inhibitor. Include any necessary spreadsheets, graphs and …

4. The lower the intermolecular forces, the more easily a compound leaves the li

4. The lower the intermolecular forces, the more easily a compound leaves the liquid phase, the faster the rate of evaporation, and thus the higher the vapor pressure. Rank the no…

4. The mass of a mixture of sand, NaCl, and Caco, is 4.3800 g. After the dissolu

4. The mass of a mixture of sand, NaCl, and Caco, is 4.3800 g. After the dissolution of the salt and filtration of the mixture, the filtrate is collected in a beaker with a mass o…

4. The mass of a mixture of sand, NaCl, and Caco, is 4.3800 g. After the dissolu

4. The mass of a mixture of sand, NaCl, and Caco, is 4.3800 g. After the dissolution of the salt and filtration of the mixture, the filtrate is collected in a beaker with a mass o…

4. The mechanism for a reaction is assumed to be: A + B - > P k=1.0 x10^5 1/M.s

4. The mechanism for a reaction is assumed to be: A + B - > P k=1.0 x10^5 1/M.s at 27 degree C a) Calculate the initial rate of formation of P if 0.10 M A is mixed with 0.10 M …

4. The molar heat of vaporization Molar mass/g mol 159.81 of bromine at 25°C is

4. The molar heat of vaporization Molar mass/g mol 159.81 of bromine at 25°C is +15.0 kJ-mol-I. How much heat (in kJ) would be required to vaporize 25.0 g of bromine, Br? (A) 375 …

4. The pressure of 4.0 L of nitrogen in a flexible container is decreased to one

4. The pressure of 4.0 L of nitrogen in a flexible container is decreased to one-half its original te temperature is increased to double the original temperature. The pressure, an…

4. The radioactive nuclide 100Tc decays to form the stable nuclide 100Mo. a) The

4. The radioactive nuclide 100Tc decays to form the stable nuclide 100Mo. a) There are two possible pathways for this decay. Write a balanced equation for each. b) Only one of the…

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