Chemistry concepts and calculations

1. ) A= Ch 3 Ch 2 ChBrCH 2 CH 3 B= Ch 3 ChBrCh 2 CH 2 CH 3 A and B are stereoiso

1. ) A= Ch3Ch2ChBrCH2CH3 B= Ch3ChBrCh2CH2CH3 A and B are stereoisomers with the same molecular formula. They are not mirror images of one another. Which of the following best desc…

1. )for Yogurt needs coagulation of casein protein by addition of streptococci a

1. )for Yogurt needs coagulation of casein protein by addition of streptococci and lactobacillie to produce( dropping the ph Tartaric acid Lactice acid A Citric acid C Malic acid …

1. * Put in order from lowest to highest boiling point 0.17 m Ba(NO3)2 0.14 m Fe

1. * Put in order from lowest to highest boiling point 0.17 m Ba(NO3)2 0.14 m Fe(CH3COO)2 0.15 m CrCl2 0.49 m Sucrose( nonelectrolyte) 2. A student measures the S2- concentration …

1. +-/4 points GVSUChem 116v2 15.c.1.P001 The Effect of a Common Ion on Molar So

1. +-/4 points GVSUChem 116v2 15.c.1.P001 The Effect of a Common Ion on Molar Solubility: Theory The addition of a common ion has been shown to disturb a system at equilibrium. Na…

1. +0/1 points Previous Answers OSColPhys2016 15.1.P003 My Notes Ask k Your Teac

1. +0/1 points Previous Answers OSColPhys2016 15.1.P003 My Notes Ask k Your Teacher A system does 2.00 × 10s of work while 6.20 × 108 J of heat transfer occurs to the environment …

1. - Find The Bugs in the pseudocode below (you should find at least 5 bugs): //

1. - Find The Bugs in the pseudocode below (you should find at least 5 bugs): // This program counts how many sales are made in each of 5 categories of products. // The user conti…

1. -1 points OSGenChem1 5.1.WA 00 A piece of aluminum with a mass of 4.01 grams

1. -1 points OSGenChem1 5.1.WA 00 A piece of aluminum with a mass of 4.01 grams is heated to raise its temperature from 23.1°C to 207.6°C My Notes O Ask Your T (a) What quantity o…

1. .How will the concentration of crystal violet be measured in this experiment?

1. .How will the concentration of crystal violet be measured in this experiment? Question 9 options: absorbance rate constant temperature time 2. A certain reaction is followed by…

1. /The decomposition of A is first order, and [A] is monitored. The following d

1. /The decomposition of A is first order, and [A] is monitored. The following data are recorded: t/min 0 A/IM] 0.100 0.09050.0819 0.0670 a. Calculate k. (What is the rate constan…

1. 0.075 moles of LiF is added to 1 L of a saturated solution of BaF2. a) write

1. 0.075 moles of LiF is added to 1 L of a saturated solution of BaF2. a) write the ksp reaction and expression for BaF2. explain b) what is the molar solubility of the BaF2 in th…

1. 0.1M HCl solution is prepared by 120-fold dilution of concentrated HCl. it is

1. 0.1M HCl solution is prepared by 120-fold dilution of concentrated HCl. it is standardized by titrating 0.1876g of dried primary standard sodium carbonate: CO32-+2H+=H2O+CO2 Th…

1. 0.278 g of lead (II) nitrate are dissolved in water to produce 500.0 mL of so

1. 0.278 g of lead (II) nitrate are dissolved in water to produce 500.0 mL of solution. Calculate: a) Concentration of lead ions in ppm b) Concentration of nitrate ions in ppt 2. …

1. 0.5 moles of lithium chloride are dissolved in o.05 liters of water. What is

1. 0.5 moles of lithium chloride are dissolved in o.05 liters of water. What is the molarity of the solution? 2.0.25 grams of magnesium chloride are dissolved to make 50 militers …

1. 0.500g of a solid acid was dissolved in water and titrated to endpoint with 3

1.       0.500g of a solid acid was dissolved in water and titrated to endpoint with 30.50 mL of a 0.10M NaOH solution.  What is the equivalent weight of the acid? A.             …

1. 0.568 g of acetone (molecular weight 58.08 g mol-s burned in an adiabatic bom

1. 0.568 g of acetone (molecular weight 58.08 g mol-s burned in an adiabatic bomb calorimeter (constant volume and constant temperature of 298 K) and heat release of 7.84 kJ was o…

1. 0/0.63 points | Previous Answers WebAssignGenChem1 8.11.001 My NotesAsk Your

1. 0/0.63 points | Previous Answers WebAssignGenChem1 8.11.001 My NotesAsk Your Teacher Urea, which has the chemical formula (NH2)2CO, is a fertilizer that can be prepared by reac…

1. 01 points I Previous Answers OSColPhys2016 15.1.P.003 My Notes Ask Your Teach

1. 01 points I Previous Answers OSColPhys2016 15.1.P.003 My Notes Ask Your Teacher A ShowQuestion Details108 J of work while 7.10 x 108 J of heat transfer occurs to the environmen…

1. 1 eq NaOCHs CHJOH H3CO 2. cold aqueous acid OEt 2. 1. 1 eq NaOEt EtOH 2. cold

1. 1 eq NaOCHs CHJOH H3CO 2. cold aqueous acid OEt 2. 1. 1 eq NaOEt EtOH 2. cold aqueous acid d Sy2 Nucleophilic substitution a Electrophilic addition b=E2 Elimination g-Nucleophi…

1. 1) The female silkworm moth produces a sex attractant called bombykol, which

1.       1)                    The female silkworm moth produces a sex attractant called bombykol, which is composed of  80.61% carbon, 12.68%                       hydrogen, and …

1. 1) When butane gas, C 4 H 10 , burns in oxygen gas, O 2 , to form carbon diox

1.       1)  When butane gas, C4H10, burns in oxygen gas, O2, to form carbon dioxide gas, CO2, and gaseous water, 2845 kJ of thermal energy is evolved per mole of butane burned. a…

1. 1,2-epoxy-1-methylcyclohexane reacts with Br- followed by acidto produce A)(1

1. 1,2-epoxy-1-methylcyclohexane reacts with Br- followed by acidto produce A)(1S,2S)-1-bromo-2-hydroxy-1-methylcyclohexane +enantiomer. B)(1R,2S)-2-bromo-1-hydroxy-1-methylcycloh…

1. 1,3-diester is less acidic than a 1,3-ketoester, which is less acidic than an

1. 1,3-diester is less acidic than a 1,3-ketoester, which is less acidic than an 1,3-diketone due to increased electron donation by the -OR group of the ester. 2. Claisen reaction…

1. 1. Consider the reaction 2A + 2B --> products. If the rate of a reaction does

1. 1. Consider the reaction 2A + 2B --> products. If the rate of a reaction does not change when the concentration of A is increased from 2.00 M to 6.00 M, the order of the rea…

1. 1. During the recrysttallization o Benzoic acid a student with a melting poin

1.       1.       During the recrysttallization o Benzoic acid a student with a melting point o 122-123 c. The student looks up the melting point o benzoic acid and find that the …

1. 1. The nature of the earth\'s interior has been determined by both direct (i.

1. 1. The nature of the earth's interior has been determined by both direct (i.e., direct observation of rocks) and indirect (i.e., geophysical) observations. Direct: A. (5 pts) O…

1. 1. What is the molar % composition of Cl in carbon tetrachloride? Choose one

1.   1. What is the molar % composition of Cl in carbon tetrachloride? Choose one answer. A. 92.2% B. 23.0% C. 71.7 D. 46.1% E. 7.8% 2.    I2. n the correct Lewis structure for me…

1. 1. Zinc has five naturally occurring isotopes: 48.63% of 64Zn, with an atomic

1. 1. Zinc has five naturally occurring isotopes: 48.63% of 64Zn, with an atomic weight of 63.929 amu; 27.90% of 66Zn, with an atomic weight of 65.926 amu; 4.10% of 67Zn, with an …

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium chromate,k2cr04(FW 194.2) in 100ml of water. The reaction produce the percipitate lead chromate qu…

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium chromate,k2cr04(FW 194.2) in 100ml of water. The reaction produce the percipitate lead chromate qu…

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium chromate,k2cr04(FW 194.2) in 100ml of water. The reaction produce the percipitate lead chromate qu…

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium

1. 1.000 gram of lead sulfate, PbS04(fw 303.2) is mixed with 1.000g of potassium chromate,k2cr04(FW 194.2) in 100ml of water. The reaction produce the percipitate lead chromate qu…

1. 1.67 moles of an ideal monatomic gas(C m,p. = 5R/2) at 26.50 o C is expanded

1. 1.67 moles of an ideal monatomic gas(Cm,p. = 5R/2) at 26.50oC is expanded at aconstant pressure of 745 Torr until its final temperature is78.33oC. Calculate, in kJ, for the sys…

1. 1.A solution was prepared by dissolving 32.0g of KCl in 225 g of water. Expre

1. 1.A solution was prepared by dissolving 32.0g of KCl in 225 g of water. Express your answer with the appropriate units. 2.Calculate the mole fraction of the ionic species KCl i…

1. 10 points. State differenc ring structure and having an oxygen atom e one maj

1. 10 points. State differenc ring structure and having an oxygen atom e one major difference between having a nitrogen atom in a in that structure 2. 10 points. Would you expect …

1. 10 points. State one major difference between having a nitrogen atom in a rin

1. 10 points. State one major difference between having a nitrogen atom in a ring structure and having an oxygen atom in that structure. 2. 10 points. Would you expect amines to b…

1. 100 mL of aqueous solution containing 2, 4, 6-trinitrotoluene (TNT) at an ini

1. 100 mL of aqueous solution containing 2, 4, 6-trinitrotoluene (TNT) at an initial concentration of 0.05 ppm is shaken with 10 mL hexane. After phase separation, it was determin…

1. 16 Points] Indicate whether each of the followi ng statements are true or fal

1. 16 Points] Indicate whether each of the followi ng statements are true or false: e majority of generation reactions are second-order T F H eat transfer by conduction requires a…

1. 16 Points] Indicate whether each of the followi ng statements are true or fal

1. 16 Points] Indicate whether each of the followi ng statements are true or false: e majority of generation reactions are second-order T F H eat transfer by conduction requires a…

1. 18.0 g of oxygen gas occupies 10.5 L in an expandable container at a particul

1. 18.0 g of oxygen gas occupies 10.5 L in an expandable container at a particular temperature and pressure. What volume will the the gas occupy if 54.0 g of oxygen are added to c…

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Consider the following reaction where Kc 77.5

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Consider the following reaction where Kc 77.5 at 600 K. COgCl2@CoCh(g A reaction mixture was found to contain 1.95x10-2 moles of CO(g). 4.15x10-…

1. 2. 3. 4. 5. 6. Two 20.0-g ice cubes at -10.0 degreeC are placed into 285 g of

1. 2. 3. 4. 5. 6. Two 20.0-g ice cubes at -10.0 degreeC are placed into 285 g of water at 25.0 degreeC. Assuming no energy is transferred to or from the surroundings, calculate th…

1. 2. 3. 4. Plz help! Determine the number of protons and electrons in each of t

1. 2. 3. 4. Plz help! Determine the number of protons and electrons in each of the following ions: Cl- S2- Ca2+ Classify these elements as metal or nonmetal. Br Zn Mg S Pt the per…

1. 2. 3. A 100.0 ml KOH. Calculate the pH of the solution after the addition of

1. 2. 3. A 100.0 ml KOH. Calculate the pH of the solution after the addition of 49.00 ml of the KOH solution. Maleic acid has pKa values of 1.92 and 6.27. n containing 0.9553 g of…

1. 2. 3. A 100.0 ml KOH. Calculate the pH of the solution after the addition of

1. 2. 3. A 100.0 ml KOH. Calculate the pH of the solution after the addition of 49.00 ml of the KOH solution. Maleic acid has pKa values of 1.92 and 6.27. n containing 0.9553 g of…

1. 2. 3. How many grams of lead(l) fluoride dissolve when 1.525 g of PbF2 is add

1. 2. 3. How many grams of lead(l) fluoride dissolve when 1.525 g of PbF2 is added to a 500.0 mL solution of 0.0125 M HNO, Determine the pH of a solution this is made by mixing 10…

1. 2. 3. Use the pull-down boxes to specify states such as (aq) or (s). If a box

1. 2. 3. Use the pull-down boxes to specify states such as (aq) or (s). If a box is not needed leave it blank. If no reaction occurs leave all boxes blank and click on "Submit". C…

1. 2. 3.How would integration distinguish the 1H NMR spectra of the following co

1. 2. 3.How would integration distinguish the 1H NMR spectra of the following compounds? 4.The 1H NMR spectrum of a compound with the formula C4H8Cl2 consists of a triplet at ? 3.…

1. 2. Portable hot packs are available for skiers and other people engaged in ot

1. 2. Portable hot packs are available for skiers and other people engaged in other outdoor activities in a cold climate. The air-permeable paper packet contains a mixture of powd…

1. 2.00 x 10 -4 mol of NH 3 , 1.50 x 10 -5 mol N 2 , and 3.54 x 10 -1 mol H 2 ar

1. 2.00 x 10-4 mol of NH3, 1.50 x 10-5 mol N2, and 3.54 x 10-1 mol H2 are mixed in a 1.00 L rigid container at 500oC. At this temperature, Kc for this reaction is 6.0 x 10-2. Sinc…

1. 2.3 2 . (-1) is the ans. Every free amino acid has at least two ionizable fun

1. 2.3 2 . (-1) is the ans. Every free amino acid has at least two ionizable functional groups, the amino group and the carboxylic acid group. Some amino acids have ionizable side…