Chemistry concepts and calculations

260 | SAMPLE EXAMINATION 2 56. The distnibution of gascous N, molocules at a cer

260 | SAMPLE EXAMINATION 2 56. The distnibution of gascous N, molocules at a certain temperature is depicted below z. MOLECULAR SPEED, m/s If the Kelvin temperature is doubled wha…

268 SAMPLE EXAMINATION 2 o0 Question5 Consider the equilibriua reaction A mixtur

268 SAMPLE EXAMINATION 2 o0 Question5 Consider the equilibriua reaction A mixture coataining 1.00 mole each of methane and water vapor is brought to equilibrium in a rigid 1.00 L …

27 (15 points) a. What is the pH of o.1uofo.1Macetic acid (CH,cooH)? Ka 1.8x105

27 (15 points) a. What is the pH of o.1uofo.1Macetic acid (CH,cooH)? Ka 1.8x105 a. What is the pH after you added 10mL of o.1M NaoH to o.1L of o.1M acetic acid? b. What is the pH …

27) Bermuda is close to North Carolina, but unlike North Carolina it has a tropi

27) Bermuda is close to North Carolina, but unlike North Carolina it has a tropical climate year round. Why is this so? A) Since North Carolina is so humid, much of the sun's ener…

27) The following reaction takes place in a lead storage battery. Discharging: P

27) The following reaction takes place in a lead storage battery. Discharging: Pb(s) + PbO2(s) + 4H+(aq) + 2SO4^2-(aq) -> 2PbSO4(s) + 2H20(l) Charging: 2PbSO4(s) + 2H2O(l) -&gt…

27) Which is the most powerful oxidizing agent. Iodine fluorine oxygen lithium .

27) Which is the most powerful oxidizing agent. Iodine fluorine oxygen lithium . 28) Why do most materials fail? Theoretical, ultimate stress is reached Defects Sin Boston Tunnel …

27) Which is the most powerful oxidizing agent. a) Iodine b) fluorine c) oxygen

27) Which is the most powerful oxidizing agent. a) Iodine b) fluorine c) oxygen d) lithium . 28) Why do most materials fail? a) Theoretical, ultimate stress is reached b) Defects …

27, 28, 29 please show how you came to your answer EXTRA CREDIT 27, K, for the r

27, 28, 29 please show how you came to your answer EXTRA CREDIT 27, K, for the reaction: NILCI(s) e, IICHg) + NHO is 1.04 x 103 atr. If 1.00 mole of NH4Cl(s) is placed in an prces…

27. (24 pts) Energetics of photosynthesis a) Write out the balanced equation for

27. (24 pts) Energetics of photosynthesis a) Write out the balanced equation for the light reactions of photosynthesis, in which water is oxidized to produce NADPH. b) What is the…

27. -28- Which type of enzyme ensures template chain? ensures that the correct b

27. -28- Which type of enzyme ensures template chain? ensures that the correct base for growing the chain is aligned with the a. a. gyrases b. ligases c. DNA polymerases d. primas…

27. 2 H20() H3O+(aq) + OH-(aq) The autoionization of water is represented by the

27. 2 H20() H3O+(aq) + OH-(aq) The autoionization of water is represented by the equation above. Values of pKw at various temperatures are listed in the table below. Temperature (…

27. 2 aqueous solutions are both at room temperature and are then mixed in a cof

27. 2 aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter. The reaction causes the temperature of the resulting solution to fall below ro…

27. A buffer solution a. is used to control the pH of a solution b. contains at

27. A buffer solution a. is used to control the pH of a solution b. contains at least 100 times more of a weak acid than its conjugate base c. contains at least 100 times less of …

27. A buffer solution a. is used to control the pH of a solution b. contains at

27. A buffer solution a. is used to control the pH of a solution b. contains at least 100 times more of a weak acid than its conjugate base c. contains at least 100 times less of …

27. A buffer solution a. is used to control the pH of a solution b. contains at

27. A buffer solution a. is used to control the pH of a solution b. contains at least 100 times more of a weak acid than its conjugate base c. contains at least 100 times less of …

27. A buffer solution a. is used to control the pH of a solution b. contains at

27. A buffer solution a. is used to control the pH of a solution b. contains at least 100 times more of a weak acid than its conjugate base c. contains at least 100 times less of …

27. A buffer solution a. is used to control the pH of a solution b. contains at

27. A buffer solution a. is used to control the pH of a solution b. contains at least 100 times more of a weak acid than its conjugate base c. contains at least 100 times less of …

27. A buffer solution a. is used to control the pH of a solution b. contains at

27. A buffer solution a. is used to control the pH of a solution b. contains at least 100 times more of a weak acid than its conjugate base c. contains at least 100 times less of …

27. A sketch of a phase diagram is given below Which statement about this diagra

27. A sketch of a phase diagram is given below Which statement about this diagram is can melt the soli can cause the solid to sublime can cause the liquid to v at constant at cons…

27. Be sure to answer all parts. Calculate the concentrations of H2C2O4, HC2O4,

27. Be sure to answer all parts. Calculate the concentrations of H2C2O4, HC2O4, C2O42, and H+ species in a 0.330 M oxalic acid solution (Ka1 = 6.5 × 102, Ka2 = 6.1 × 105). Be sure…

27. Determine the enthalpy change, AH, for the reaction, CS() + 30, colg) + 2SMO

27. Determine the enthalpy change, AH, for the reaction, CS() + 30, colg) + 2SMO, given the following thermochemical equations: C(s) + O2(g) CO2(g) AlH- -296.8k AH 87.9 kJ c(s) + …

27. Explain three primary structural controls which may influence ore 28. How do

27. Explain three primary structural controls which may influence ore 28. How does the ore deposit in the CM bed of the Pioche district indicate the 29. Explain why faults which h…

27. Explain three primary structural controls which may influence ore 28. How do

27. Explain three primary structural controls which may influence ore 28. How does the ore deposit in the CM bed of the Pioche district indicate the 29. Explain why faults which h…

27. For the given reaction, Qc = [SO3]^2/[SO2]^2.[O2] feeding the concentration

27. For the given reaction, Qc = [SO3]^2/[SO2]^2.[O2] feeding the concentration values, Qc = (10)^2/(0.1)^2.(0.1) = 1.0 x 10^5 So, Qc < Kc, therefore, d. Qc < Kc, the reacti…

27. For the reaction below, what will be true for the NH]-0.30 M, [H:]-0.15 M, a

27. For the reaction below, what will be true for the NH]-0.30 M, [H:]-0.15 M, and IN]-020 M system if (A) The system is at equilibrium. (B) The amount of product will increase ov…

27. How many moles of nitrogen are formed when 25.0 g of KNO3 decomposes accordi

27. How many moles of nitrogen are formed when 25.0 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.1 g/mol. How many moles of oxygen are f…

27. In the hydrogenation of double bonds, a catalyst is needed. In the first ste

27. In the hydrogenation of double bonds, a catalyst is needed. In the first step, the reactants must come into contact with a metal surface. This step is known as A. adsorption B…

27. Marty the mouse is to navigate his way through a ten-foot by twenty-foot rec

27.  Marty the mouse is to navigate his way through a ten-foot by twenty-foot rectangular room whose floor is made of red and white one-foot square tiles. Marty hates red tiles an…

27. Since the electrons from both NADH and FADH2 end up being carried by ubiquin

27. Since the electrons from both NADH and FADH2 end up being carried by ubiquinone, why would the electrons from NADH have a bigger impact on ATP generation? 28. The protein comp…

27. The Heat transferred through wave energy (electromagnetic waves) is: A. Subl

27. The Heat transferred through wave energy (electromagnetic waves) is: A. Sublimation B. Conduction C. Radiation D. Nuclear Fusion 28. During heat transfer, thermal energy alway…

27. The electron configuration of a ground-state Co atom is C) [Ne]3s23d\" D) [A

27. The electron configuration of a ground-state Co atom is C) [Ne]3s23d" D) [Ar]4s'3d E) [Ar]4s 4d 28. Which element has the following ground-state electron configuration? A) Sn …

27. The temperature of a 809 milliliter sample of gas increases from 71 Celsius

27. The temperature of a 809 milliliter sample of gas increases from 71 Celsius to 255 Celsius. What is the final volume of the sample of gas, in milliliters, if the pressure and …

27. Which direction is the Pacific Plate moving in the vicinity of Los Angeles?

27. Which direction is the Pacific Plate moving in the vicinity of Los Angeles? A. NE B. NW C. SW D. N E. S 28. What are the dominant forces at divergent boundaries? A. Extension …

27. Which of the following compounds has the highest percent of iron by mass a.

27. Which of the following compounds has the highest percent of iron by mass a. FeCl2 b. FeO c. Fe(OH)2 d. FeCls PERCENT COMPOSITION AND CHEMICAL FORMULAS 1. A sample of a compoun…

27. Which one of the following is NOT amphoteric? [A] Zn(OH) 2 [B] Sn(OH) 2 [C]

27. Which one of the following is NOT amphoteric?    [A] Zn(OH)2 [B] Sn(OH)2 [C] Ca(OH)2 [D] Cr(OH)3 [E] Al(OH)3      28. Which below best describe(s) the behavior of an amphoteri…

27. d. London dispersion 28. The empirical formula = CH2 empirical formula mass

27. d. London dispersion 28. The empirical formula = CH2     empirical formula mass = 14    molecular formula = (empirical forula)n                 n     = molecular mass/ empiric…

27.39 g please finish the table sample1 sample 2 Sample 3 mass of flask 24.3 g 2

27.39 g please finish the table sample1 sample 2 Sample 3 mass of flask 24.3 g 24.32 g 24.33 g mass of flask+lime water 27.29 g 27.39 g 27.38 g mass of lime water 2.99 g 3.07 g 3.…

27/2017 11:55 PM 11.3/100 1/24/2017 09:56 PM Grade te Print calculator Periodic

27/2017 11:55 PM 11.3/100 1/24/2017 09:56 PM Grade te Print calculator Periodic Table uestion 3 of 16 incorrect Sapling Learning Map Gaseous hydrogen and oxygen can be prepared in…

270 | SAMPLE EXAMINATION 2 Question7 Use the reaction above to answer the questi

270 | SAMPLE EXAMINATION 2 Question7 Use the reaction above to answer the questions (a) and (b) below. A student adds some zinc dust to an aqueous solution of CusSO, in an insulat…

270, mm Hg? M-mous = A) 0.0565 moVL B) 0.355 moVL C) 0448 moVL D) 42.9 mol/L 24)

270, mm Hg? M-mous = A) 0.0565 moVL B) 0.355 moVL C) 0448 moVL D) 42.9 mol/L 24) Determine the freezing point of a solution that contains 78.8 g of naphthalene (C1oHs. molar mass-…

271 11 A reaction releases 0.65 kcal of energy, if the increase in temperature i

271 11 A reaction releases 0.65 kcal of energy, if the increase in temperature is 2.0°C, what is the volume of water in calorimeter? 12 Write the rate law for complete combustion …

276 I CHAPTER 8 Quantities in Chemical Reactions 37. Consider the balanced equat

276 I CHAPTER 8 Quantities in Chemical Reactions 37. Consider the balanced equation for the combustion of 38 methane, a component of natural gas: CH(g) +202(8) CO (8) + 2 HO(g) Co…

279 Date, Lab Section Results and Discussion - Experiment 23- Acids and Bases: p

279 Date, Lab Section Results and Discussion - Experiment 23- Acids and Bases: pH Measurements o an extemsion to this experiment, sce Activity 35, Part C A pH of acids, bases and …

279% c a compound uiai com d. an ami de that has a molecular ion with an m/z val

279% c a compound uiai com d. an ami de that has a molecular ion with an m/z value of 115 PROBLEM 6 Iacompound has a molecular ion with an odd-numbered mass, then the molecular io…

28 Based on the activity series, which one of the reactions below will occur? a.

28 Based on the activity series, which one of the reactions below will occur? a. Zn (s)+ Mnl(aq) Znly (aq)+ Mn (s) b. SnCl2(aa)+ Cu (s)-Sn (s)+CuCl:(aq) c. 2AgNO (aq)+ Pb (s) 2Ag …

28 Feb 2012 Rate Law Determination LC CHE 169 of the Crystal Violet Exp.#A 11 Re

28 Feb 2012 Rate Law Determination LC CHE 169 of the Crystal Violet Exp.#A 11 Reaction In this experiment, it will study the reaction between crystal violet and sodium hydroxide. …

28 POST-LAB QUESTIONS: 1. Write balanced net ionic equations for the following r

28 POST-LAB QUESTIONS: 1. Write balanced net ionic equations for the following reactions: a. The addition of HCl to a solution of Pb" (Step #3) The formation ofa yellowerecipitate…

28 The Class DoorKnob represents some kind of turnable handle. The instances kno

28 The Class DoorKnob represents some kind of turnable handle. The instances knob and goldenknob were created by saying: DoorKnob knob; By default, an unlockable door knob DoorKno…

28 The actual sodium chloride content in the sea water was 2.69%. If it had been

28 The actual sodium chloride content in the sea water was 2.69%. If it had been assumed that the dissolved solid s) consisted only of sodium chloride, what percentage error would…

28&29 please explain answer zs. Which line Cand D to form energy for the reactio

28&29 please explain answer zs. Which line Cand D to form energy for the reaction between A and B (D) 3-4 (B) 2-3 (A) 1-4 2s. The decomposition of hydrogen peroxide in the pre…