Chemistry concepts and calculations

1)Place these events in the correct order from the least recent to the most rece

1)Place these events in the correct order from the least recent to the most recent. If research leading to this invention, event, or finding spanned many years use the date of the…

1)Place these events in the correct order from the least recent to the most rece

1)Place these events in the correct order from the least recent to the most recent. If research leading to this invention, event, or finding spanned many years use the date of the…

1)Place these events in the correct order from the least recent to the most rece

1)Place these events in the correct order from the least recent to the most recent. If research leading to this invention, event, or finding spanned many years use the date of the…

1)Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in th

1)Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is…

1)Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in th

1)Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions. It has the unwieldy formula of KHC8H4O4. This is…

1)Potassium permanganate (KMnO4) solutions are used for the determination of iro

1)Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 800. …

1)Potassium permanganate (KMnO4) solutions are used for the determination of iro

1)Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 800. …

1)Small quantities of H 2 gas can be collected by adding HCl to Zn. A sample of

1)Small quantities of H2 gas can be collected by adding HCl to Zn. A sample of 195 mL of H2 gas was collected OVER WATER at 25 C and 753 mm of Hg. What mass of H2 was collected? (…

1)Sodium hydroxide cannot be used to prepare a primary standard titration soluti

1)Sodium hydroxide cannot be used to prepare a primary standard titration solution because the compound is not available in high purity. The most common impurity is water because …

1)Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and

1)Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0220 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? …

1)Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkl

1)Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkling sodium bicarbonate on it and then mopping up the resultant solution. The sodium bicarbonate rea…

1)Sulfamic acid, HSO3NH2, and sodium nitrite, NaNO2, should not be brought toget

1)Sulfamic acid, HSO3NH2, and sodium nitrite, NaNO2, should not be brought together as solids for safety reasons, why is water added to the vial containing your unknown sample as …

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose that you have 0.500 L of each of the following solutions, and an unlim

1)Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is qu…

1)Suppose you were studying an enzyme that hydrolyzes the C-terminal amino acid

1)Suppose you were studying an enzyme that hydrolyzes the C-terminal amino acid off a small peptide hormone.  Your studies suggest that the active site has two carboxylic acid gro…

1)The Kc for the following reaction is 6.50 at 600 K. CO(g) + H2O(g) CO2(g) + H2

1)The Kc for the following reaction is 6.50 at 600 K. CO(g) + H2O(g) CO2(g) + H2(g) If 2.00 mole of CO and 2.00 mole of H2O are placed in a 1.00 L flask at 600 K, calculate the CO…

1)The NaCl2 ionic salt does not exist. Which of the following statements best ex

1)The NaCl2 ionic salt does not exist. Which of the following statements best explains why? A. Because the formation of Na2+ is an unfavorable process due to the great amount of e…

1)The NaCl2 ionic salt does not exist. Which of the following statements best ex

1)The NaCl2 ionic salt does not exist. Which of the following statements best explains why? A. Because the formation of Na2+ is an unfavorable process due to the great amount of e…

1)The boiling point of benzene C6H6 is 80.10°C at 1 atmosphere. A nonvolatile, n

1)The boiling point of benzene C6H6 is 80.10°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is TNT (trinitrotoluene). How many grams of TNT, C7H5N3O6 (…

1)The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol

1)The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood. L…

1)The compound manganese(II) iodide is a strong electrolyte. Write the transform

1)The compound manganese(II) iodide is a strong electrolyte. Write the transformation that occurs when solid manganese(II) iodide dissolves in water. Use the pull-down boxes to sp…

1)The compound manganese(II) iodide is a strong electrolyte. Write the transform

1)The compound manganese(II) iodide is a strong electrolyte. Write the transformation that occurs when solid manganese(II) iodide dissolves in water. Use the pull-down boxes to sp…

1)The cubic form for the fictitious element Smeltium is FCC, the atomic radius i

1)The cubic form for the fictitious element Smeltium is FCC, the atomic radius is 141.8 pm and the molar mass is 255.7 g/mol. Determine the density of Smeltium. 2) A student combi…

1)The disk of the Sun subtends an angle of 0.533° at the Earth. What are (a) the

1)The disk of the Sun subtends an angle of 0.533° at the Earth. What are (a) the position and (b) the diameter of the solar image formed by a concave spherical mirror with a radiu…

1)The equation for the conditional formation constant of an EDTA-metal complex i

1)The equation for the conditional formation constant of an EDTA-metal complex ion is: Kf' = Kf·y4-= [MYn-4] / [Mn+] [Y4-]. The presence in the solution of an auxiliary complexing…

1)The equilibrium constant for the reaction 2NH3(g) --> N2(g) + 3H2(g) is K= 0.0

1)The equilibrium constant for the reaction 2NH3(g) --> N2(g) + 3H2(g) is K= 0.0250 at 300C. At equilibrium A) products predominate B) reactants predominantly C) only products …

1)The equilibrium constant for the reaction 2SO2(g) + O2(g) 2SO3(g) is 5.3 × 102

1)The equilibrium constant for the reaction 2SO2(g) + O2(g) 2SO3(g) is 5.3 × 102 at a certain temperature. Determine the equilibrium concentration of sulfur trioxide [SO3], if the…

1)The following data were collected at 20 degrees Celsius for the reaction of br

1)The following data were collected at 20 degrees Celsius for the reaction of bromphenol blue (HBPB2-) and hydroxide ions (OH-). HBPB2- + OH- <-------> BPB3- + H2O The times…

1)The following information is given for water , H 2 O , at 1atm: At a pressure

1)The following information is given for water, H2O, at 1atm: At a pressure of 1 atm,  kJ of heat are needed to vaporize a 26.0 g sample of liquid water at its normal boiling poin…

1)The following proposed mecchanism for the reaction A + B= C + D: Step 1: A + C

1)The following proposed mecchanism for the reaction A + B= C + D: Step 1: A + C = 2D (slow) ; Step 2: B + D = 2C (fast). The rate law consistent with this mechanism would be:____…

1)The following two isomers of C3H7NO exist in equilibrium with each other in so

1)The following two isomers of C3H7NO exist in equilibrium with each other in solution: 8) If Kc = 0.57 at 25°C and the initial concentration of the reactant is 0.50 M and the pro…

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt…

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt…

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt…

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt…

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt…

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half

1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt…

1)The intrinsic concentration of electrons and holes (i.e. concentration of e-h

1)The intrinsic concentration of electrons and holes (i.e. concentration of e-h pairs) in Si at room temperature is approximately 1x1010 cm-3. Given the density and atomic mass of…

1)The metabolism of one mole of glycerol trioleate, C51 H93 O6, a common fat, pr

1)The metabolism of one mole of glycerol trioleate, C51 H93 O6, a common fat, produces 3.022 x 10^4 kj of heat. How many grams of the fat must be burned to raise the temperature o…

1)The people who inhabited Mexico first were the … Amerindians Aztecs and the Ma

1)The people who inhabited Mexico first were the … Amerindians Aztecs and the Mayans the Spanish and the Americans there were a number of pre-Colombian civilizations 2) The major …

1)The pressure inside a hydrogen-filled container was 2.10 atm at 21 ?C. What wo

1)The pressure inside a hydrogen-filled container was 2.10 atm at 21 ?C. What would the pressure be if the container was heated to 98?C ? 2)At standard temperature and pressure (0…

1)The pressure inside a hydrogen-filled container was 2.10 atm at 21 ?C. What wo

1)The pressure inside a hydrogen-filled container was 2.10 atm at 21 ?C. What would the pressure be if the container was heated to 98?C ? 2)At standard temperature and pressure (0…

1)The protocol that asks for a MAC address for a known IP address is _____. 2)Tr

1)The protocol that asks for a MAC address for a known IP address is _____. 2)Traceroute relies on the______ field within the IP packet header. 3) Which of the following is *not* …