Chemistry4. BPGH/2013/Prelim/P1/Q38The diagram shows the structure of the compound 1,3-butadiene.H H H H+3/BrE←CC-fCC+BresHBr Br. H BrHKHCalle + BrAfter reacting three moles of 1,3-butadiene with one mole of bromine, howmany grams of hydrogen will react with what is remaining ?A 4 gramsB 10 grams C 12 grams D 20 gramsна вThe diagram below shows how the structural formulasimplified:butene can beUsual structural formula of buteneSimplified versionHHC.IMH- CHHThe simplified structural formula of benzene is shown below:What is the empirical formula of benzene?A CHBB CH2C CH3D CH4-HHTCIHGec14 4 4eat Br

4. Given, Compound = 1,3-Butadiene After reacting three moles of 1,3-Butadiene with 1 mole of…

4. BPGH/2013/Prelim/P1/Q38 The diagram shows the structure of the compound 1,3-butadiene. H H H Br Η Η Η Η |||| + + 3(Br=B) ₁ G C & C H Br C C C C | | #Br Br Br. H H Call + Br H After reacting three moles of 1,3-butadiene with one mole of bromine, how many grams of hydrogen will react with what is remaining? A 4 grams B 10 grams C 12 grams D 20 grams ка в

4. BPGH/2013/Prelim/P1/Q38 The diagram shows the structure of the compound 1,3-butadiene. H H H Br Η Η Η Η |||| + + 3(Br=B) ₁ G C & C H Br C C C C | | #Br Br Br. H H Call + Br H After reacting three moles of 1,3-butadiene with one mole of bromine, how many grams of hydrogen will react with what is remaining? A 4 grams B 10 grams C 12 grams D 20 grams ка в

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 9RQ: What characterizes an electrolytic cell? What is an ampere? When the current applied to an...

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Table 17-1 lists common half-reactions along with the standard reduction potential associated with each half-reaction. These standard reduction potentials are all relative to some standard. What is the standard (zero point)? lf is positive for a half-reaction, what does it mean? If is negative for a half-reaction, what does it mean? Which species in Table 17-1 is most easily reduced? Least easily reduced? The reverse of the half-reactions in Table 17-1 are the oxidation half-reactions. How are standard oxidation potentials determined? In Table 17-1, which species is the best reducing agent? The worst reducing agent? To determine the standard cell potential for a redox reaction, the standard reduction potential is added to the standard oxidation potential. What must be true about this sum if the cell is to be spontaneous (produce a galvanic cell)? Standard reduction and oxidation potentials are intensive. What does this mean? Summarize how line notation is used to describe galvanic cells.
What characterizes an electrolytic cell? What is an ampere? When the current applied to an electrolytic cell is multiplied by the time in seconds, what quantity is determined? How is this quantity converted to moles of electrons required? How are moles of electrons required converted to moles of metal plated out? What does plating mean? How do you predict the cathode and the anode half-reactions in an electrolytic cell? Why is the electrolysis of molten salts much easier to predict in terms of what occurs at the anode and cathode than the electrolysis of aqueous dissolved salts? What is overvoltage?
balancing equations C2H6+O2=CH3COOH+H2O
Whic‎h of the foll‎owing is a sponta‎neous reacti‎on.? a. Rxn with ΔH =- 10Kj/mol ΔS= -5J/mol T= 300K b. NaCl +H20 -> NaOH + HCl 25C c. H2‎0(l) -> H2O(s) Te‎mp: 25C d. Dissolut‎ion of 100g of so‎lid sugar in 100 mL ice te‎a. Consi‎der follo‎wing rea‎ction: HgO (s) -> Hg(l) + ½ O2 (g) Delta H = +90.7 kj/mol. Wh‎at qua‎ntity of h‎eat in kj/mol is req‎uired to prod‎uce on‎e m‎ole HgO? Wri‎te your answer wit‎hout units. Gi‎ven the fol‎lowing data 2Cl‎F(g) + O‎2(g) --> Cl2‎O(g) + F2‎O (g) De‎lta H= 167.4 kJ I 2Cl‎F3(g) + 2O‎2(g) --> Cl‎2O(g) + 3F2‎ O (g) Delta H= 341.4 kJ II 2 ‎F2(g) + O‎2(g) ---> 2F2O‎ (g) Delt‎a H= -43.4 kJ III Calc‎ulate the de‎lta H in kJ for below‎ reaction: ClF(g) + F2(g) ---> ClF3(g)
Urea, CO(NH2)2 is slowly converted to ammonia (NH3) at 25.0 °C according to the following reaction. CO(NH2)2 (aq) + H2O (l) → CO2 (aq) + NH3 (aq) The following data were obtained for this reaction Compound ∆H°f (kJ/mol) CO(NH2)2 (aq) -319.2 H2O (l) -412.9 CO2 (aq) -285.8 NH3 (aq) -80.3 A) Calculate ∆H° for the reaction B) What type of reaction is this (endothermic, exothermic, neither) c)Calculate the change in enthalpy (∆H°) for the decomposition of 2.00 g of urea.
What is ΔSsurr for a reaction at 28.6 °C with ΔHsys = 38.9 kJ mol-1 ? Express your answer in J mol-1 K-1 to at least two significant figures.
50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3 volumetric flask. This flask is made up to the mark with distilled water and then shaken well. The concentration of the potassium hydroxide in this second flask is:
1-Pentanol to 1-bromopentane Chemicals: - 60ml Conc. Sulfuric Acid - 100ml Saturated Sodium bicarbonate - 65ml 1-Pentanol - 78g sodium bromide - Distilled water - 58.42g 1-Bromopentane 1-Pentanol Sodium Bromide Sulfuric Acid 1-Bromopentane Formula C5H12O NaBr H2SO4 C5H11Br MW (g/mol) 88.15 102.894 98.078 151.04 Density (g/mL) 0.811 3.21 1.84 1.218 Boiling point (*C) 138 1,396 337 130 NaBr(aq) + H2SO4(aq) -> NaHSO4(aq) + HBr(aq) CH3(CH2)4OH(aq) + H+ Br- (aq) CH3(CH2)4OH2 (aq) + Br-(aq) CH3(CH2)4OH2 (aq) + Br-(aq)  CH3(CH2)4Br(aq) + H2O(aq) How do I calculate the percent yield and identify the limiting reagent?
Carbon dioxide from the atmosphere “weathers”, or dissolves, limestone, CaCO3 by thereaction.CaCO3 (s) + CO2 (g) + H2O (l) → Ca2+ (aq) + 2 HCO3- (aq)What is DH° for this reaction? DH°f CaCO3 (s) = -1206.9 kJ/mol, DH°f CO2 (g) = -393.5 kJ/mol,DH°f H2O (l) = -285.8 kJ/mol, DH°f Ca2+ (aq) = -542.8 kJ/mol, DH°f HCO3 (aq) = -692.0 kJ/mol
Aleks data for AgBrO3 is 5.38 x 10^-5
A sample containing chlorophenol, C6H4ClOH, was analysed by gravimetric analysis. A 0.783-g of this sample goes through a chemical process allowing the chlorine in the chlorophenol to precipitate as silver chloride, weighing 0.271 g. Calculate the % (wt/wt) of the chlorophenol in the sample, assuming that chlorophenol is the only source of chlorine in the sample. Provide your answer to two decimal places and without units. Avoid using scientific notation.
1) Commercial fuming Sulphuric acid (Oleum-H2S2O6) is 99.9% solution. Please convert it into molarity.2) Find out the Volume (dm3) of product (gas) at RTP when 0.58 M, 150 mL NaOH (aq.) reacts with 350 mL, 0.25 NH4Cl.