(a)
Interpretation:
Differences in the dipole moments of molecules
Concept Introduction:
The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity.
Dipole moment: It is the measure of the charge separation that is describes the polar in the bond between the two atoms.
Electronegativity: It is defined as the capacity of the atom to abstract the pair of electrons towards itself results to have high negative charge.
(b)
Interpretation:
Differences in the dipole moments of molecules
Concept Introduction:
Refer to (a).
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Chapter 7 Solutions
OWLv2 for Moore/Stanitski's Chemistry: The Molecular Science, 5th Edition, [Instant Access], 1 term (6 months)
- If an electron is removed from a fluorine molecule, an F+2molecular ion forms.(a) Give the molecular electron configurations for F2 and F+2 (for the MOs constructed from valence AOs).(b) Give the bond order of each species.(c) Predict which species should be paramagnetic.(d) Predict which species has the greater bond dissociation energy.arrow_forward. Assume that the third-period element phosphorus forms a diatomic molecule, P2, in an analogous way as nitrogen does to form N2. (a) Write the electronic configuration for P2. Use [Ne2] to represent the electron configuration for the first two periods. (b) Calculate its bond order. (c) What are its magnetic properties (diamagnetic or paramagnetic)?arrow_forwardThe sulfate ion can be represented with four S-O bonds or with two S-O and two So=O bonds.(a) Which representation is better from the standpoint of formal charges?(b) What is the shape of the sulfate ion, and what hybrid orbitals of S are postulated for the σ bonding?(c) In view of the answer to part (b), what orbitals of S must be used for the π bonds? What orbitals of O?(d) Draw a diagram to show how one atomic orbital from S and one from O overlap to form a π bond.arrow_forward
- Which one of the following molecules does not have a dipole moment? Justify your answer. (a) BrCI(b) CIF(c) BrF(d) O2(e) ICIarrow_forward10. The following Lewis structures for (a) HCN, (b) C3H;, (c) SnOz, (d) BF3, (e)HOF are incorrect. Explain what is wrong with each one and give a correct structure for the molecule. (Relative positions of atoms are shown correctly.) (a) H-ëN (b) HCC-H (c) 0-Sn-0 (d) :F B :F: (e) H-O-F:arrow_forwardExplain why(a) XeF2 has a linear molecular structure and not a bent one.(b) ClF3 has a T-shaped structure and not a trigonal-planar one.arrow_forward
- (a) Find the angle u between adjacent nearest-neighbor bonds in the silicon lattice. Recall that each silicon atom is bonded to four of its nearest neighbors.The four neighbors form a regular tetrahedron— a pyramid whose sides and base are equilateral triangles. (b) Find the bond length, given that the atoms at the corners of the tetrahedron are 388 pm apart.arrow_forwardWhich substance in each of the following pairs would you expect to have the higher boiling point? (a) Ne or Xe, (b) CO2 or CS2, (c) CH4 or Cl2, (d) F2 or LiF, (e) NH3 or PH3 (a) Ne; (b) CS2; (c) CH4; (d) F2 ; (e) NH3 (a) Xe; (b) CS2; (c) Cl2; (d) LiF ; (e) PH3 O (a) Xe; (b) CS2; (c) Cl2; (d) LiF ; (e) NH3 (a) Xe; (b) CS2; (c) Cl2; (d) F2 ; (e) NH3 (a) Xe; (b) C02; (c) CH4 ; (d) LiF ; (e) PH3arrow_forwardThe phosphorus trihalides (PX3) show the following variationin the bond angle X—P—X: PF3, 96.3°; PCl3, 100.3°;PBr3, 101.0°; PI3, 102.0°. The trend is generally attributedto the change in the electronegativity of the halogen.(a) Assuming that all electron domains are the same size,what value of the X—P—X angle is predicted by the VSEPRmodel? (b) What is the general trend in the X—P—Xangle as the halide electronegativity increases? (c) Usingthe VSEPR model, explain the observed trend in X—P—Xangle as the electronegativity of X changes. (d) Based onyour answer to part (c), predict the structure of PBrCl4.arrow_forward
- The species is the simplest polyatomic ion. The geometry of the ion is that of an equilateral triangle. (a) Draw three resonance structures to represent the ion. (b) Given the following information 2 H+ + H+ ---> ∆H° = - 849 kJ/mol and H2 ---> 2H ∆H° = -436.4 kJ/mol calculate ∆H° for the reaction H+ + H2 --->arrow_forwardPropylene, C3H6, is a gas that is used to form the importantpolymer called polypropylene. Its Lewis structure is given. (a) What is the total number of valence electrons in the propylenemolecule? (b) How many valence electrons are usedto make σ bonds in the molecule? (c) How many valenceelectrons are used to make π bonds in the molecule? (d) Howmany valence electrons remain in nonbonding pairs in themolecule? (e) What is the hybridization at each carbon atomin the molecule?arrow_forward(a) How does a polar molecule differ from a nonpolar one? (b) Atoms X and Y have different electronegativities. Will the diatomic molecule X—Y necessarily be polar? Explain. (c) What factors affect the size of the dipole moment of a diatomic molecule?arrow_forward
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