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- 3 (a) Explain why BrF4 is square planar, whereas BF is tetrahe dral. (b) How would you expect the H-X-H bond angle to vary in the series H20, H2S, H2SE? Explain. (Hint: The size of an electron pair domain depends in part on the electronega- tivity of the central atom.) (3014On 6b, why are the two Br on the 2nd carbon and not the 3rd??
- a. CH3CHO(g) + O2(9) CH3COOH(1) b. AgCl(s) + Br2(1) AgBr(s) + c. C12H22011(s) + O2(g) Given: Ethanal, CH3CHO(g) Oxygen, O2(g) Ethanoic Acid, CH3COOH (1) Silver Chloride, AgCl(s) Bromine gas, Br2(1) J/Kmol 3 sig. figs. J/Kmol 3 sig. figs. CO₂(g) + H₂O(1) (+) J/Kmol 4 sig. figs. Chlorine gas,Cl2(g) Silver Bromide, AgBr (s) Sucrose, C12H22011(s) Carbon Dioxide, CO2(g) Water H₂0(1) Cl₂(g) Sm(J/K.mol) 250.3 205.138 159.8 96.2 152.23 223.07 107.1 360.2 213.74 69 917. a) Under normal conditions (room temperature & atmospheric pressure) potassium assumes bcc lattice. Atomic radius for 12-coordinate K atom is listed as 235 pm. What is the radius of potassium atom under normal conditions? (3 points) b) Titanium metal crystallyzes in hcp lattice. Under proper conditions nitrogen can be absorbed into the lattice of titanium resulting in an alloy of stoichiometry TiNo.2. Is this compound likely to be a substitutional or an interstitial alloy? (Radius of Ti (12-coordinate) is 147 pm; radius of N atom is 75 pm. (3 points)What would be the observation following mixing BaCl2 and Pb(NO3)2?
- 18. When one electron is added to an oxygen molecule, a superoxide ion (O₂) is formed. The addition of two elec- trons gives a peroxide ion (O2). Removal of an electron from O₂ leads to O₂. 2 (a) Construct the correlation diagram for O₂. (b) Give the valence electron configuration for each of the following species: Oz, O₂, O₂, O3-. 2 (c) Give the bond order of each species. (d) Predict which species are paramagnetic. (e) Predict the order of increasing bond dissociation energy among the species.When one electron is added to an oxygen molecule, a superoxide ion (O2-) is formed. The addition of two electrons gives a peroxide ion (O22-). Removal of an electron from O2 leads to O2+. (a) Construct the correlation diagram for O2-. (b) Give the valence electron configuration for each of the following species: O2+, O2, O2-, O22-. (c) Give the bond order of each species. (d) Predict which species are paramagnetic. (e) Predict the order of increasing bond dissociation energy among the species.2b) NH₂ NH₂
- Account for the fact that nitroacetic acid, O2NCH2COOH (pKa 1.68), is a considerably stronger acid than acetic acid, CH3COOH (pKa 4.76).1- The following chemical reaction takes place in an aqueous solution: FeBr2 (aq) + 2KOH (aq) → Fe(OH)2 (s) + 2KBr (aq) Write the net ionic equation for this reaction. 2- Draw the Lewis structure for ethane (C2H6). Be certain you include any lone pairs. 3-Predict the products of the reaction below. That is, complete the right-hand side of the chemical equation. Be sure your equation is balanced. HBr + Ca(OH)2 → 4-A chemistry student needs 25.0 g of methyl acetate for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of methyl acetate is 0.934 g *cm-3. Calculate the volume of methyl acetate the student should pour out. Be sure your answer has the correct number of significant digits. ____________mL 5- NASA communicates with the Space Shuttle and International Space Station using Ku-band microwave radio. Suppose NASA transmits a microwave signal to the Space Shuttle using radio…Hh.189.
