Alkoxides R-O- can be used to synthesize alkenes as exemplified by the reaction shov below, where the symbol (et) indicates that the substance is dissolved in ethanol (CH;CH,OH) used as solvent: Br (1) HO, Br(et) (et) (g) + + (et) CH,CH,OH + t-but-Br Ethoxide Isobutylene 10. What is the value of the rate constant for the synthesis of isobutylene at 25 °C? Initial Rate (M/s) [isobutylene] а) 6.8 х10-8 Trial Initial Initial [t-but-Br] [Ethoxide] b) 8.5 x10-7 6.8 x 10-8 13.6 x 10-8 1 0.08 M 0.04 M c) 2.1 x 10-5 0.16 M 0.04 M 6.8 x 10-8 13.6 x 10-8 d) 1.1 x10-5 3 0.08 M 0.08 M 4 0.16 M 0.08 M

Alkoxides R-O- can be used to synthesize alkenes as exemplified by the reaction shov below, where the symbol (et) indicates that the substance is dissolved in ethanol (CH;CH,OH) used as solvent: Br (1) HO, Br(et) (et) (g) + + (et) CH,CH,OH + t-but-Br Ethoxide Isobutylene 10. What is the value of the rate constant for the synthesis of isobutylene at 25 °C? Initial Rate (M/s) [isobutylene] а) 6.8 х10-8 Trial Initial Initial [t-but-Br] [Ethoxide] b) 8.5 x10-7 6.8 x 10-8 13.6 x 10-8 1 0.08 M 0.04 M c) 2.1 x 10-5 0.16 M 0.04 M 6.8 x 10-8 13.6 x 10-8 d) 1.1 x10-5 3 0.08 M 0.08 M 4 0.16 M 0.08 M

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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need it soon also need explaination for why other options are incorrect or else I will downvote
5. Use the Hess' Law to calculate AH° (tot) for the [tot] reaction from the AHo's given: [tot] N2(g) + 3H2(g) → 2NH3(g) AH°(tot) = ? kJ [1] 4NH3(g) + 302(g) → 2N2(g) + 6H;0(g)_ AH°1 = -1268 kJ [2] 2H2(g) + O2(g) → 2H20(g) AH°2 = -484 kJ [tot] = x[1] _x[2] add up equations [1] and [2] scaled by the factors you chose, and cancel the same formulas on both sides: same as [tot] after cancelling? if "Yes", scale the enthalpies AH°1 and AH°2 by the factors you chose for their equations, and combine for the AH°(tot) = _XAH°1 -ΧΔΗ*> k %3D
Pre-lab: Theory The heat of neutralization of solid metal hydroxide with an aqueous solution of an acid might be determined directly in a one-step reaction МОН (:) + H M'+ Hә0(1) or indirectly using a two-step reaction MOH(s) - Mt + OH OH +H* → H2O(1) Based on the net ionic equation of the reaction, the theoretical enthalpy of reaction, AHneo kJ/mol], can be found from the enthalpies of formation as AHheo = AH; [H2O(1)] + AH; [M* (aq)] – AH¡ [MOH(s)] Based on the measured change in temperature, AT[K], and the heat capacity of the cup, Ccup[J /K], the experimental enthalpy of reaction, AHrp[kJ/mol], can be found as = - (Su Vtot + Ccup) AT/nL.R., where Vtot (mL] is the total volume of the solution, nL.R.[mmol] is the amount of the limiting reagent, and specific heat of water is s, = 4.18 JmL-'K-! The percent error can be found according to the formula ΔΗ 'exp AHiheo -AHiheo x 100% %E = Using the values for standard enthalpies of formation from the table 8-1 find the enthalpies for the…
Find the AHn for the following reaction: given the following reactions and subsequent AH values $$ (1) (2) (3) $$ Select one: Oa. -2368.4 kJ Ob. none of the following Oc. 621.1 kJ Od. 229.2 kJ 2C(s) + H₂(g) → C₂ H₂ (9) C>H₂(g) + O₂(g) + 2CO,(4) - H₂O(l) C(s) 0₂ (9) CO₂ (9) H₂(g) + + O₂(9) › H₂O(l) AH AH AH 1298.8 kJ -391.9 kJ -285.8 kJ
For the part circled in white, I don't understand when simplifying this why we don't divide the coefficient in front of octane by 2. I thought it would be 1/2 Since we divided the other ones by 2.
10 Please help me with the answer and solution thank you
3. Heats of reaction can also be calculated using heats of formation and the relationship - AHrxn = ΣnAHƒ.prod — ΣmAHƒ.reac Substance HCl(aq) MgCl2(aq) MgO(s) H₂O(/) H.(kJ/mol) -167.2 -796.8 -601.2 -285.8 0 a. Standard State Elements Calculate the theoretical AH° values for the following reaction Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) Mg(s) + O2(g) → MgO(s)
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00 Turkcell 3G 03:22 @ %27D 3. When 120 mg of naphthalene, CH, (s), was burned in a bomb calorimeter the temperature rose by 3.05 K a) Calculate the calorimeter constant. b) By how much will the temperature rise when 10 mg of phenol, C,HOH(s), is bumed in the calorimeter under the same conditions? (AH n.- -5156.3 kJ/mol and Mw CH 128.17 g/mol, AH° CESON = -3054 kJ/mol, Mw CO94.12 g/mol) 4 At 25°C, the density of a 50 % by mass ethanol/water solution is 0.914 g cm. Given that the partial molar volume of water in this solution is 17.4 cm'mol'. What is the partial molar volume of the ethanol? (d 0.789 g/cm': d-1.00 g cm": Mw for water-18 g mot', ethanol-46.07g mot 5. The addition of 5.00 g of a compound to 250 g of naphthalene lowered the freezing point of naphthalene by 0.780 K. Calculate the molar mass of the compound. (K, 694 KAgmol for naphthalene)
Find the value of x in the following transformation (report the result as a whole number): Fe2O3(s) + 3C(graphite) --> 2Fe(s) + 3CO(g); ΔH = x kJ 4Fe(s) + 3O2(g) --> 2Fe2O3(s); ΔH = -1,403 kJ 2C(graphite) + O2(g) --> 2CO(g); ΔH = -193 kJ
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Given that = -546.6kJ H,(g) +F,(g)→ 2 HF(g) rxn AHixn = -571.6 kJ (1DO H7 - (8) o+ (8) H calculate the value of AHn for UXI (8)0 + (3) e (DoʻH7 + (3) AHixn %3D UXI