Chemistry concepts and calculations

1. Observation: You went out to a local coastal marsh and took a sediment core.

1. Observation: You went out to a local coastal marsh and took a sediment core. You look at it and find a layer of grass material about 6 cm thick from the surface. Below that lay…

1. Obtain 10 ml of 0.75 M Cu(NO)h and pour it into a 250 mL beaker. Add 90 mL of

1. Obtain 10 ml of 0.75 M Cu(NO)h and pour it into a 250 mL beaker. Add 90 mL of water to the beaker as well. Slowly add 30 mL of 3 M NaOH to the solution in the beaker, use a gla…

1. Obtain 10.0 mL of 0.10 M HCl. Transfer 9.0 mL to a 50 mL or 100 mL beaker lab

1. Obtain 10.0 mL of 0.10 M HCl. Transfer 9.0 mL to a 50 mL or 100 mL beaker labeled HCl #1. Dilute 1.0 mL of the 0.10 M HCl to 10.0 mL with deionized water in your graduated cyli…

1. Octane (C 8 H 18 ) undergoes combustion according to the following thermochem

1. Octane (C8H18) undergoes combustion according to the following thermochemical equation: 2C8H18(l) + 25O2(g) 16CO2(g) + 18H2O(l)       H°rxn = –11,020 kJ/mol. Given that DH°f[CO…

1. Of th following anions,Br ,CO32 ,CI ?, NOg , NO2703 ,s042 and SO , list those

1. Of th following anions,Br ,CO32 ,CI ?, NOg , NO2703 ,s042 and SO , list those ions that meet the following criteria. (1) Gives a precipitate with Ag ion that is insoluble in HN…

1. Of the different drugs discussed in this experiment, which should have the gr

1. Of the different drugs discussed in this experiment, which should have the greatest Rf value with a nonpolar developing solvent and why? -Acetaminophen, because the amine and a…

1. Of the following atoms, the one with the largest radius is: a) magnesium b) p

1. Of the following atoms, the one with the largest radius is: a) magnesium b) potassium c) carbon d) nitrogen e) helium 2. Of the following species, the one with the largest radi…

1. Of the gasses helium, oxygen, neon, sulfur dioxide, and nitrogen, which shows

1. Of the gasses helium, oxygen, neon, sulfur dioxide, and nitrogen, which shows the most variation in its atmospheric concentration? 2. What is the most abundant hydrocarbon in t…

1. Of the many conformations, which appears best for the ring: a planar of a puc

1. Of the many conformations, which appears best for the ring: a planar of a puckered arrangement? 2. Based on above the four isomers you created, which pairs are constitutional i…

1. On Exam 1, you were asked to consider the film The Martian, in which a chemis

1. On Exam 1, you were asked to consider the film The Martian, in which a chemist harnesses energy associated with the reaction between table sugar and liquid oxygen, shown in the…

1. On Exam 1, you were asked to consider the film The Martion, in which a chemis

1. On Exam 1, you were asked to consider the film The Martion, in which a chemist harnesses energy associated with the reaction between table sugar and liquid oxygen, shown in the…

1. On a humid day, which is more comfortable to wear, a cotton T-shirt or a poly

1. On a humid day, which is more comfortable to wear, a cotton T-shirt or a polyester dress shirt? What property of the fabric makes that difference? Explain in chemical structure…

1. On a separate sheet of paper, define or describe the following terms: (1 poin

1. On a separate sheet of paper, define or describe the following terms: (1 points each) a endo-vs exothermic reactions b. enthalpy d. enthalpy of formation e. enthalpy of reactio…

1. On average, human lungs can contain 5.8 g of air at sea level at room tempera

1. On average, human lungs can contain 5.8 g of air at sea level at room temperature (1.00 atm and 25 °C). Assuming air is mostly N2, what is the average volume of a pair of human…

1. On page 0-34 of the course notes, we compared dairy manure table values and a

1. On page 0-34 of the course notes, we compared dairy manure table values and an actual analysis (given on page O-35). Assume the difference in estimated and actual total N conte…

1. On page 410 in your Brown & Foote textbook, the following reaction is shown.

1. On page 410 in your Brown & Foote textbook, the following reaction is shown. 3-pentanol + HBr --heat--> 3-bromo-pentane (major product) + 4-bromo-pentane (minor product)…

1. On the Section 7 (Part 2) text handout (pp. 3/4), the implications of the mag

1. On the Section 7 (Part 2) text handout (pp. 3/4), the implications of the magnitude of K is presented, with respect to predictions about product/reactant favoured equilibria. T…

1. One liter of saturated actinium hydroxide solution contains .021 g of dissolv

1. One liter of saturated actinium hydroxide solution contains .021 g of dissolved Ac(OH)3. Calculate Ksp for Ac(OH)3 CORRECT ANS: 8.8E-16 solve and explain pls 2. For a particula…

1. One mole of O2(g) undergoes the following change in state. O2(g, 353 K, 5.03

1. One mole of O2(g) undergoes the following change in state. O2(g, 353 K, 5.03 bar)   O2(g, 401 K, 2.21 bar) What is S for the gas? Assume ideal gas behaviour. The constant press…

1. One mole of O2(g) undergoes the following change in state. O2(g, 353 K, 5.03

1. One mole of O2(g) undergoes the following change in state. O2(g, 353 K, 5.03 bar)   O2(g, 401 K, 2.21 bar) What is S for the gas? Assume ideal gas behaviour. The constant press…

1. One mole of solid sodium chloride (NaCl) is dissolved in 1 L of water. Predic

1. One mole of solid sodium chloride (NaCl) is dissolved in 1 L of water. Predict if entropy increases or decreases as a result of this process. i. increases ii. decreases     2. …

1. One of the assumptions is that the heat generated by the reaction is absorbed

1. One of the assumptions is that the heat generated by the reaction is absorbed by pure Calculate nsity 1.0 the mass of HCI, the mass of Mg in your first trial and the mass of wa…

1. One of the common fertilizer used to enrich soil with phosphate is superphosp

1. One of the common fertilizer used to enrich soil with phosphate is superphosphate, CaH4(PO4)2. Typically, superphosphate is produced by reacting some form of phosphate rock wit…

1. One of the main advantages of Hydrogen as a fuel is that: A) plants can econo

1. One of the main advantages of Hydrogen as a fuel is that: A) plants can economically produce the hydrogen needed B) it exists as a free gas C) it can be economically supplied b…

1. One of the major limitations of the first law of thermodynamics is: a. It doe

1. One of the major limitations of the first law of thermodynamics is: a. It does not say anything about the system and its surroundings b. It says that the energy of the universe…

1. One should always carefully consider which solvent to choose for a reaction.

1. One should always carefully consider which solvent to choose for a reaction. Which of the following solvents are inappropriate for the reduction of an ester using lithium alumi…

1. One snack food packaging contains 37 grams of dried vegetable. The student ta

1. One snack food packaging contains 37 grams of dried vegetable. The student takes the entire contents of the package and grinds it using pestle and mortar. After the sample is p…

1. One snack food packaging contains 37 grams of dried vegetable. The student ta

1. One snack food packaging contains 37 grams of dried vegetable. The student takes the entire contents of the package and grinds it using pestle and mortar. After the sample is p…

1. One-use heating pads generate heat when a salt such as calcium chloride is di

1. One-use heating pads generate heat when a salt such as calcium chloride is dissolved in water. Which of the following statements is true about the process that occurs in these …

1. Open the input file and read the records into an array of Student structures.

1. Open the input file and read the records into an array of Student structures. You'll need to create this array dynamically, because you won't know how many records there are un…

1. Open the input file and read the records into an array of Student structures.

1. Open the input file and read the records into an array of Student structures. You'll need to create this array dynamically, because you won't know how many records there are un…

1. Order: Carbamazepine 150 mg po b.i.d. for a child who is 5 years old and weig

1. Order: Carbamazepine 150 mg po b.i.d. for a child who is 5 years old and weighs 40 lbs. The recommended dosage for children under 6 years of age is 10-20 mg/kg/day in 2 to 4 di…

1. Our digestive enzymes are able to break the linkages in starch to release ene

1. Our digestive enzymes are able to break the linkages in starch to release energy-producing glucose, but they are unable to liberate glucose molecules from cellulose because the…

1. Our gas chromatogram with electron capture detector (GC-ECD) can detect very

1.     Our gas chromatogram with electron capture detector (GC-ECD) can detect very low concentrations of nitro containing compounds (like trinitrotoluene, TNT).  We can easily de…

1. Outline the reaction sequence for formation of 4-Chlorotoluene from p-Toluidi

1. Outline the reaction sequence for formation of 4-Chlorotoluene from p-Toluidine. 2. Explain the change in color of copper sulfate from blue to white. Support your answer with s…

1. Oxidation is the loss of electrons. True False 2. Fe (s) --> Fe 2+ + 2e - is

1. Oxidation is the loss of electrons. True False 2. Fe (s) --> Fe2+ + 2e- is an example of reduction. True False 3. What is the oxidation number of the chlorine atoms in Cl2? …

1. Oxidation of 1g carbohydrate, fat and protein yields 0.56, 1.07, and 0.42 g m

1. Oxidation of 1g carbohydrate, fat and protein yields 0.56, 1.07, and 0.42 g metabolic water respectively. Retention of 1g of dietary protein yields 0.16 g metabolic water where…

1. Oxidation of SO2 to SO3 is favoured by A. low temperature and low pressure. B

1. Oxidation of SO2 to SO3 is favoured by A. low temperature and low pressure. B. low temperature and high pressure. C. high temperature and low pressure. D. high temperature and …

1. Oxygen gas is collected over water at 22.0 degree C. The pressure in the coll

1. Oxygen gas is collected over water at 22.0 degree C. The pressure in the collection bottle is equilibrated with atmospheric pressure, which is measured to be 749.8 torr. What i…

1. Oxygen\'s atomic number is 8. This means that an oxygen atom has (a) Eight ne

1. Oxygen's atomic number is 8. This means that an oxygen atom has (a) Eight neutrons in its nucleus (b) A total of eight protons and neutrons (c) Eight protons in its nucleus (d)…

1. P A = P T x Y A P A = partial pressure of any gas A P T = total pressure of g

1. PA = PT x YA PA = partial pressure of any gas A PT = total pressure of gas YA = mole fraction of gas A PT = PN2 + PO2 =0.1 atm + 0.4 atm = 0.5 atm YO2 = PO2/PT = 0.4 atm / 0.5 …

1. PCl5(g)->/

1. PCl5(g)->/<-PCl3(g)+Cl2(g) Kd=.0420 The concentrations of the products at equilbrium are PCl3=.120M and Cl2=.290M. -What is the concentration of the reactatn PCL5 atequil…

1. PV = nRT P = 534 torr = 534/760 = 0.7 atm V = 345ml = 0.345L T = 25+273 = 298

1. PV = nRT P   = 534 torr   = 534/760   = 0.7 atm V   = 345ml   = 0.345L T   = 25+273 = 298K PV   = nRT n     = PV/RT        = 0.7*0.345/0.0821*298    = 0.00987moles 2. Initial  …

1. Packed beds with water are also used to remove Sulfur Dioxide (to reduce acid

1. Packed beds with water are also used to remove Sulfur Dioxide (to reduce acid rain). Discuss the differences in the molecular structures of CO2 and SO2. How might the nature of…

1. Paper pulp produced by kraft/sulphate process is A. bleached easily B. dull w

1. Paper pulp produced by kraft/sulphate process is A. bleached easily B. dull white in color C. strong fibrous D. dark colored 2. Claude process of gas liquefaction employs A. me…

1. Part A 2. Suppose some of the solid calcium hydroxide is inadvertently transf

1. Part A 2. Suppose some of the solid calcium hydroxide is inadvertently transferred along with the supernatant liquid for analysis. a. Will more, less, or the same amount of hyd…

1. Part B 0.30 mole of C2H6 Express your answer using two significant figures. P

1. Part B 0.30 mole of C2H6 Express your answer using two significant figures. Part D What mass of PCl5 will be produced from the given masses of both reactants? Express your answ…

1. Pathway regulation (25 points) a. State whether each of the following conditi

1. Pathway regulation (25 points) a. State whether each of the following conditions is more likely to favor glycolysis or gluconeogenesis (no explanation needed): i. increase in A…

1. Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25oC the vapor

1. Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25oC the vapor pressures of pentane and hexane are 511 and 150 torr, respectively. A solution is prepared by mixin…

1. Perform binary addition of the following pairs of 16-bit numbers (shown in he

1. Perform binary addition of the following pairs of 16-bit numbers (shown in hexadecimal) and indicate whether your result is “right” or “wrong.” First treat them as unsigned val…