Chemistry concepts and calculations

(a) A gas scrubber on an oilrig discharged gas periodically such that an accumul

(a) A gas scrubber on an oilrig discharged gas periodically such that an accumulation of hydrocarbon gas nearby had occurred. A contractor welder was dispatched to a job immediate…

(a) A mile is 5,280 feet and a foot is 12 inches. How many miles are in 1km? (Ex

(a) A mile is 5,280 feet and a foot is 12 inches. How many miles are in 1km? (Explain) (b) The gasoline-engine Peugeot 107 consumes 4.6 L of fuel per 100 km. Express the fuel effi…

(a) A pair of students found a 3.0% error in Part A. They now have to distinguis

(a) A pair of students found a 3.0% error in Part A. They now have to distinguish between Cu (specific heat = 0.384 J/g · °C) or Zn (s = 0.389 J/g · °C). They have exactly 5.00 g …

(a) A piston at 1.5 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 1.5 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 0.17 L? ______atm (b) …

(a) A piston at 2.6 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 2.6 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 1.35 L? atm (b) A pist…

(a) A piston at 4.1 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 4.1 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 1.03 L? (b) A piston a…

(a) A piston at 4.9 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 4.9 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 1.3 L? _____atm (b) A …

(a) A piston at 5.8 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 5.8 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 1.69 L? ____ atm (b) A…

(a) A piston at 6.7 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 6.7 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 0.11 L? atm (b) A pist…

(a) A piston at 8.7 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 8.7 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 0.42 L? atm (b) A pist…

(a) A piston at 9.4 atm contains a gas that occupies a volume of 3.5 L. What pre

(a) A piston at 9.4 atm contains a gas that occupies a volume of 3.5 L. What pressure would have to be placed on the piston to force the volume to adjust to 0.84 L? atm (b) A pist…

(a) A researcher analyzed an unknown solid, extracted from the bark of spruce tr

(a) A researcher analyzed an unknown solid, extracted from the bark of spruce trees, to determine its percentage composition. An 11.32 mg sample was burned in a combustion apparat…

(a) A sample of solid Ca(OH) 2 is stirred in waterat 30 degree C until the solut

(a) A sample of solid Ca(OH)2 is stirred in waterat 30 degree C until the solution contains as much dissolvedCa(OH)2 as it can hold. A 100.-mL sample of thissolution is withdrawn …

(a) A set of standards is run for a set of NiCl 2 •6H 2 O solutions. The data is

(a) A set of standards is run for a set of NiCl2•6H2O solutions. The data is plotted with absorbance on the y axis and the molarity of the nickel ion on the x-axis. The slope of t…

(a) A solution composed of 55.5 g of carbon disulfide and 104.3 g of dimethoxyme

(a) A solution composed of 55.5 g of carbon disulfide and 104.3 g of dimethoxymethane is made. Assuming an ideal solution is formed, what is the vapor pressure of this solution? (…

(a) A standard iodine solution was standardized against a 0.4123 g primary stand

(a) A standard iodine solution was standardized against a 0.4123 g primary standard As4O6 by dissolving the As4O6 in a small amount of NaOH solution, adjusting the pH to 8, and ti…

(a) A student ran a chromatogram for bismuth(III), Bi 3+ following the procedure

(a) A student ran a chromatogram for bismuth(III), Bi3+ following the procedure of this experiment. The solvent front traveled 81 mm and the distance from the 2-cm line to the cen…

(a) According to Raoult\'s law P A = P o A x X A P A = partial pressure of compo

(a) According to Raoult's law PA = PoA x XA PA = partial pressure of component A PoA = vapour pressure of pure A XA = mole fraction A in liquid say benzene mole fraction in liquid…

(a) According to the Bohr model, an electron in the groundstate of a hydrogen at

(a) According to the Bohr model, an electron in the groundstate of a hydrogen atom orbits the nucleus at a specific radius of0.53 angstroms. In the quantum mechanical description …

(a) All components are in the quid phase (b) Two (c) Two (d) Au components are i

(a) All components are in the quid phase (b) Two (c) Two (d) Au components are in Siquid phase and one in sold phase G36. Scrubbers are (b) Mixing devices (c) Separation devices (…

(a) All components are in the quid phase (b) Two (c) Two (d) Au components are i

(a) All components are in the quid phase (b) Two (c) Two (d) Au components are in Siquid phase and one in sold phase G36. Scrubbers are (b) Mixing devices (c) Separation devices (…

(a) As the piston is not moving, this means that it is in equilibrium and hence

(a) As the piston is not moving, this means that it is in equilibrium and hence the internal pressure must be equal to the external pressure. So, Internal pressure = 105 Pa (b) Si…

(a) Assume a host A wants to send an IP message to another host B. Assume A know

(a) Assume a host A wants to send an IP message to another host B. Assume A knows its own configuration information (of course) and it knows the IP address of B. How does A determ…

(a) Assume that algae need carbon, nitrogen and phosphorous in the ratios 106:16

(a) Assume that algae need carbon, nitrogen and phosphorous in the ratios 106:16:1. What is the limiting nutrient in a lake that contains the following concentrations: total C = 2…

(a) Assume that in a certain country, tax is payable at the following rates: 15%

(a) Assume that in a certain country, tax is payable at the following rates: 15% on your first $50000 income 25% on any amount over $50000 Write a method that takes in an annual i…

(a) Assume that you have a solution of an unknown solute inCyclohexane. If the s

(a) Assume that you have a solution of an unknown solute inCyclohexane. If the solution has freezing point depression of9.50 C , what is the Molality of this solution. Molar freez…

(a) At 800 K the equilibrium constant for I2(g) equilibrium reaction arrow 2 I(g

(a) At 800 K the equilibrium constant for I2(g) equilibrium reaction arrow 2 I(g) is Kc = 3.1 10-5. If an equilibrium mixture in a 10.0-L vessel contains 3.57 10-2 g of I(g), how …

(a) At what rate is his excess thermal energy dissipated by radiation? (Enter yo

(a) At what rate is his excess thermal energy dissipated by radiation? (Enter your answer to at least one decimal place.) W (b) If he eliminates 0.41 kg of perspiration during tha…

(a) Balance the following equation by entering the smallest possible whole-numbe

(a) Balance the following equation by entering the smallest possible whole-number coefficients into the blank. _____ Na2SO4(s) + _____C(s) ---- _____ Na2S(s) + _____ CO(g) (b) If …

(a) Because Arrhenius equation contains the gas constant R, the Arrhenius equati

(a) Because Arrhenius equation contains the gas constant R, the Arrhenius equation applies only to gas-phase reactions (b) The Arrhenius equation holds exactly. (c) The pre-expone…

(a) Briefly explain the difference between mass transfer coefficient and diffusi

(a) Briefly explain the difference between mass transfer coefficient and diffusion coefficient using a suitable diagram (only a brief sketch) of the diffusion layer model for a re…

(a) Briefly explain the difference between mass transfer coefficient and diffusi

(a) Briefly explain the difference between mass transfer coefficient and diffusion coefficient using a suitable diagram (only a brief sketch) of the diffusion layer model for a re…

(a) CH 2 Cl 2 1 The C-H bond is polar. The net dipole points from the C atomto t

(a) CH2Cl2 1 The C-H bond is polar. The net dipole points from the C atomto the H atom. The C-Cl bond is nonpolar. The C-Cl bond is polar. The C-H bond is nonpolar. The molecule i…

(a) Calculate the [Fe3+ of each standard solution (samples 1-5 in your lab proce

(a) Calculate the [Fe3+ of each standard solution (samples 1-5 in your lab procedure) taking into account the initial dilution (4mL/100mL) of the 0.0025 M stock solution and the s…

(a) Calculate the entropy of the system in the absence of the field. (b) Calcula

(a) Calculate the entropy of the system in the absence of the field. (b) Calculate the entropy of the system in the applied field. (c) Does the system become more ordered or disor…

(a) Calculate the ionic strength of a solution of 0.2 M Na2SO4 using Equation 1,

(a) Calculate the ionic strength of a solution of 0.2 M Na2SO4 using Equation 1, assuming that there is no ion-association between Na+ and SO4 2- . Equation 1: I = 0.5(cizi 2 ) (b…

(a) Calculate the maximum non-expansion work that can be gained from the combust

(a) Calculate the maximum non-expansion work that can be gained from the combustion of benzene(l) and of H2 (g) on a per gram and a per mole basis under standard conditions. (b) I…

(a) Calculate the molarity of a solution made by dissolving 0.0915 mol Na2SO4 in

(a) Calculate the molarity of a solution made by dissolving 0.0915 mol Na2SO4 in enough water to form 550 mL of solution. M Answer to correct significant figures WebAssign will ch…

(a) Calculate the number of grid cells in the atmospheric component of the HadGE

(a) Calculate the number of grid cells in the atmospheric component of the HadGEM2-ES's climate model described in Box 15.1. (b) At the equator, HadGEM2-ES's ocean component has g…

(a) Calculate the number of theoretical plates for each compound and the average

(a) Calculate the number of theoretical plates for each compound and the average number of theoretical plates for the column. (b) Calculate the average height of a theoretical pla…

(a) Calculate the pH of the buffer solution (generated from 0.2 hosphate HPO (we

(a) Calculate the pH of the buffer solution (generated from 0.2 hosphate HPO (weak acid) and 0.7 M phosphate (conijugate 10-13 for hydrogen phosphate/phosphate. from 0.2 M hydroge…

(a) Choose all of the statements from below which correctly describe issues pert

(a) Choose all of the statements from below which correctly describe issues pertaining to the relationship between the emf of a reaction and its Gibbs free energy change. A) The G…

(a) Choose all of the statements from below which correctly describe issues pert

(a) Choose all of the statements from below which correctly describe issues pertaining to the relationship between the emf of a reaction and its Gibbs free energy change. The Gibb…

(a) Choose all of the statements from below which correctly describe issues pert

(a) Choose all of the statements from below which correctly describe issues pertaining to the relationship between the emf of a reaction and its Gibbs free energy change. (A)The G…

(a) Compare and contrast ionic conduction and metallic conduction, (b) What is a

(a) Compare and contrast ionic conduction and metallic conduction, (b) What is an electrode? (c) What is ii/i inert electrode? Support or refute each of the following statements: …

(a) Compare the oxidation number of manganese in MnO with that in Mn2O3. The oxi

(a) Compare the oxidation number of manganese in MnO with that in Mn2O3. The oxidation number of manganese in MnO is?and in Mn2O3 is? (b) What is the change in oxidation number of…

(a) Complementary colors are directly opposite each other on the \"color wheel\"

(a) Complementary colors are directly opposite each other on the "color wheel", shown below. Complementary colors cancel to white light The hydrogen emission spectrum has four lin…

(a) Consider a steam turbine with a inlet conditions 8 MPa and 460 o C. What is

(a) Consider a steam turbine with a inlet conditions 8 MPa and 460oC. What is the entropy (kJ/kg-K) of the inlet stream? (b)What is the enthalpy (kJ/kg) of the inlet steam? (c) Wh…

(a) Consider a substance where the intermolecular forces hold the molecules in f

(a) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance s…

(a) Consider a substance where the intermolecular forces hold the molecules in f

(a) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance s…