Show work. Don't use Ai for answering this.... Molecular Structure and Physical PropertiesConsider the following statements and determine which are true and which are false.NO3 has three resonance Lewis structures.☑ Selenium tetrafluoride (SeF4) is a non-polar molecule.The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as:(the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons assigned to the atom in themolecule)☑ KrF 4 is a polar molecule.☑ Carbon tetrachloride (CCI4) is a polar molecule.Bond angles for IF6+ are 60 °.

1.)2.) SeF4 is a polar molecule due to the electronegativity of the fluorine and selenium.…

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Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter19: The Chemistry Of The Main-group Elements

Section: Chapter Questions

Problem 78QRT

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(e) The mean bond enthalpy for chlorine is +242 kJ mol·l and that for fluorine is +158 kJ mol-". The enthalpy of formation of CIF (g) is 56 kJ mol·l (ii) Calculate the enthalpy of formation of, gaseous Chlorine Trifluoride, CIF3 (g), using the bond enthalpy value you obtained in part (i). (iii) The bond enthalpy of CIF3 calculated in part (ii) is likely to be different than that determined from experiment. Explain.
Answer the following questions that relate to the chemistry of nitrogen. (a) Two nitrogen atoms combine to form a nitrogen molecule, as represented by the following equation. 2 N(g) ® N2(g) Using the table of average bond energies below, determine the enthalpy change, AH, for the reaction. Average Bond Energy (k) mol-1) Bond N-N 160 N=N 420 N°N 950 (b) The reaction between nitrogen and hydrogen to form ammonia is represented below. N2(g) + 3 H2(g)® 2 NH3(g) AH° = -92.2 kJ Predict the sign of the standard entropy change, AS', for the reaction. Justify your answer. (C) The value of AG° for the reaction represented in part (b) is negative at low temperatures but positive at high temperatures. Explain.
(a) Using Lewis symbols, diagram the reaction between magnesiumand oxygen atoms to give the ionic substance MgO.(b) How many electrons are transferred? (c) Which atomloses electrons in the reaction?
Calculate the lattice energy of AgBr(s) using the following thermodynamic data (all data is in kJ/mol). Ag(s) ΔHsublimation = 265 kJ/mol Ag(g) Ionization energy = 711 kJ/mol Br-Br(g) Bond energy = 173 kJ/mol Br(g) Electron affinity = -345 kJ/mol AgBr(s) ΔH°f = -120 kJ/mol ______________ kJ/mol
1. Hydrogen (H2) and oxygen (O2) react to produce water (H2O). (a) Write down the equation for the above reaction. (b) The enthalpy change of reaction is –286 kJ mol-!. Is the reaction endothermic or exothermic? (c) What kinds of bonds are broken during the reaction? (d) What kinds of bonds are formed during the reaction? (e) Construct a diagram showing the change in enthalpy for the reaction.
Determine the enthalpy for the ammonia formation reaction from the following bond energy data: E (H-H) = 436kJ / mol, E (N-H) = 389kJ / mol, E (N triple bond N) = 946kJ / mol
(A) Balance this reaction. Then use the bond enthapies given in the table below to calculate the enthalpy of reaction for the balanced reaction. kJ/mol(B) Balance this reaction. Then use the bond enthapies given in the table below to calculate the enthalpy of reaction for the balanced reaction. kJ/mol(C) Balance this reaction. Then use the bond enthapies given in the table below to calculate the enthalpy of reaction for the balanced reaction kJ/mol
Thortveitite is a mineral that contains the silicate ion [Si2O7]6-. The structure of this ion is such that the each Si atom is bonded to three terminal oxygen atoms, and the seventh O atom forms a bridge between the two Si atoms:[O3Si-O-SiO3]6- Draw a Lewis dot structure of this ion. What is the formal charge on each Si atom?
Answer the questions in the table below about the shape of the phosphorus pentabromide (PBr,) molecule. How many electron groups are around the central phosphorus atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central phosphorus atom? (You may need to use the scrollbar to see all the choices.) (choose one) Ar Explanation Check © 2021 McGraw Hill LLC. AlI Rights Reserved. Terms of Use Privacy Center | Accessibility
From the Lewis diagram of SiF4, determine: A) The formal charge on the silicon atom. B) The formal oxidation number of the silicon atom. C) The overall charge of the molecular species.
Estimate the enthalpy of reaction( AH), using bond enthalpy values given below 2H2(g) + 02(g) 2H20(g) ( AHO) = ? > Bond energies are given: BE (H - H)= 436 kJ/mol. BE (O=0)= 496 kJ/mol. BE (O - H)= 463 kJ/mol. A. + 367.2 kJ/mol B. + 534.1 kJ/mol C. - 484.0 kJ/mol D. - 490.2 kJ/mol
(BrF,) ion. Draw the Lewis structure for the bromine difluoride C

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