Concept explainers
Interpretation:
Electron dot structure for
Concept introduction:
Electron dot structure is a representation of covalent bonding that indicates where the valence shell electrons are in the molecule. Shared electron pairs are shown as lines and lone pairs are shown as dots.
Example:
Bond order describes, if a bond is single bond order is one, if it is double bond order is 2.
Bond length is the distance between the centers of two atoms joined by a covalent bond.
Higher bond order corresponds to shorter bond length.
The bond length and bond order of some molecules are listed below,
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General Chemistry: Atoms First
- Using Lewis symbols and Lewis structures, diagram the formation of SiCl4 from Si and Cl atoms.arrow_forwardDraw all of the Lewis structures of O22- which obey the octet rule and use this Lewis structure or these resonance structures to predict how many covalent bonds connect each oxygen atom in the real structure to the central O atom. Assume that the octet rule is followed for the O atom when you draw your structure(s). Pick the correct statement from the choices below. a) Each oxygen atom is connected to the central O atom with 1 covalent bonds. b) Each oxygen atom is connected to the central O atom with 1.33 covalent bonds. c) Each oxygen atom is connected to the central O atom with 2 covalent bonds. d) Each oxygen atom is connected to the central O atom with 1.67 covalent bonds. e) Each oxygen atom is connected to the central O atom with 1.25 covalent bonds.arrow_forwardDraw the Lewis structure of SO42". Calculate the formal charge of central atom.arrow_forward
- Hydrazine, N2H4, burns in oxygen as follows: N2H4 + O2 → N2 + 2H2O [The bond energies in kJ/mol are: N-H = 388; N-N 163; N≡N 944; O-H 463; O=O 496] Draw the chemical structures of the reactants and products and give the formula to calculate enthalpy change in a reaction, ΔH.arrow_forwardGalium (Ga) is an element in group III with atomic number 31. By referring to the Periodic Table, answer the following questions. Explain how the atomic radius of gallium differs from aluminium. Explain how the electronegativity of gallium differs from aluminium. Explain how the electronegativity of gallium differs from germanium. Explain how the ionisation energy of gallium differs from germanium. Explain how the ionisation energy of gallium differs from indium.arrow_forwardDraw Lewis structures for ozone and dioxygen. Using the data given below, qualitatively compare the bond enthalpies, bond orders, and bond lengths of these two compounds: O2 (g) --> 2O(g) ∆H = +498 kJ O(g) + O2(g) à O3(g) ∆H = -105 kJarrow_forward
- In a hydrogen molecule, the two hydrogen atoms are held together by a single bond with a bond energy of 436 kJ/mol of hydrogen. In other words, to break the H-H bonds in one mole of molecular hydrogen requires the expenditure of 436 kJ of energy. Using the balanced chemical equation for the formation of water from oxygen and hydrogen (shown above), and interpreting the stoichiometric coefficients as mole amounts, how much energy must be expended in breaking the H-H bonds? kJarrow_forwardAnswer 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.arrow_forwardWhat is the Lewis Structure for P4, its electron geometry, and molecular geometry?arrow_forward
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning