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- MeO,C=-co02Me (ехсess) AJA H;° of H2O(1) is -285.8 kJ/mol. calculate A H;° of MgO. The relevant reactions for these two heats of formation are: H2(g) + ½ O2(g) H20(1) and Mg(s) + ½ O2(g) - MgO(s) > -141.3 kj/mol a) -306.6 kj/mol b) -447.9 kj/mol c) d) -592.4 kj/mol 141.3 kj/mol f) Not even information givenCalculate the enthalpy of formation of propane from:a. Combustion data (ΔHc = –2217 kJ mol–1; ΔHf (CO2) = –393.4 kJ mol–1, ΔHf (H2O) =–285.2 kJ mol–1);b. Bond enthalpies (C–C 348 kJ mol–1; C–H 413 kJ mol–1; H–H 436 kJ mol–1; ΔHvap forcarbon = –717 kJ mol–1).
- OI EGO Br Me Br In consideration of the following organic compound names and/or descriptors, which one most accurately describes the molecular structure given at right? If neither name accurately describes this structure, select NEITHER. Me OA (2R,3R)-2,3-dibromobutane O B. (2R,3S)-2,3-dibromobutane OC. NEITHER «< Questic 8. 9 K B N.For anion NO2-, (a) predict the stereochemistry. Justify your prediction with VSEPR theory and by formal charge; (b) indicate the hybridization appropriate to the stereochemistry; (c) describe the bond character of N-O for the resonance structure.Pentaborane BgHg/s) burns vigorously in O2 to give B203(s) and H20). Calculate AHpxn for the combustion of 5.00 mol of B5H9. AH{B2031s)) = -1,273.5 kJimol AH{BsHgls)] = 73.2 kJ/mol AH(H200) = -285.8 kJ/mol Muitiple Choice - 22,700 kJ -45,400 kJ 45,400 kJ - 9,090 kJ - 8,790 kJ
- 12. The combustion of what volume of ethanol, measured at 23°C and 765 mm Hg, would be required to heat 1727 g of water from 25°℃ to 78°C? (AH data table provided in anwer key) C₂H5OH (1) + 3 02 (8) → 2 CO2 (g) + 3 H₂O (1)(a) 1) Br₂, H3O+ 2) pyridine, 80°CDraw the organic prouduct of the reaction with a) HBr b) Br2 c) H2, Pt/C d) O3; (CH3)2S