Concept explainers
(a)
Interpretation:
The bonding nature of
Concept Introduction:
An electronegativity of an atom gives information about the strength that the atom has for attracting a pair of shared electrons. The greater the attraction for a pair of shared electrons when the electronegativity value is high. Consequently, when two different electronegative atoms share a pair of electrons, one atom becomes partially positive and the other atom becomes partially negative due to the attractive forces for the pair of electrons.
(b)
Interpretation:
The bonding nature of
Concept Introduction:
Refer part (a).
(c)
Interpretation:
The bonding nature of
Concept Introduction:
Refer part (a).
(d)
Interpretation:
The bonding nature of
Concept Introduction:
Refer part (a).
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EBK FOUNDATIONS OF COLLEGE CHEMISTRY
- Part A) Out of the following, the species with a single covalent bond is: (a) CO (b) CN- (c) Cl2 (d) N2 Part B) Which of the following compounds has ionic bonds only? (a) NH4ClO4 (b) Mg3N2 (c) Mg3(PO4)2 (c) CHCl3 Part C) The molecular shape and polarity of xenon tetrafluoride are: (a) Tetrahedral & non-polar (b) square planar & non-polar (c) Square pyramidal & polar (d) square planar & polararrow_forwardDraw a Lewis structure for each of the following molecules and ions. In each case, the atoms can be connected in only one way. (a) Br2 (b) H2S (c) N2H4 (d) N2H2 (e) CN- (f) NH4+ (g) N2 (h) O2arrow_forwardThe atomic number of sulfur is 16. Sulfur combines withhydrogen by covalent bonding to form a compound, hydrogensulfide. Based on the number of valence electrons in a sulfuratom, predict the molecular formula of the compound.(A) HS(B) HS2(C) H2S(D) H4Sarrow_forward
- Write the Lewis structures for the following, and include resonance structures where appropriate. Indicate which has the strongest carbon-oxygen bond.(a) CO2(b) COarrow_forwardHow many resonance structures, if any, can be drawn for the nitrate ion (NO3-)? (a) 1 (no resonance) (b) 2 (c) 3 (d) 4arrow_forwardWhich compound has two or more resonance structures?(a) NO2- (b) CO2 (c) NH4+ (d) CCl4arrow_forward
- Name the following covalent compounds:(a) SF6(b) N2O3(c) Cl2O7(d) P4O6arrow_forwardAn elemental analysis of a hydrocarbon, which contains only carbon and hydrogen, shows the mass%: element mass% carbon 92.26 hydrogen 7.743 (A) * Determine the empirical formula of the hydrocarbon. (B) The compound has a molar mass of 26.04 g/mol. Determine its molecular formula. (C, Draw the Lewis structure of the molecular compound. Count the total number of sigma bonds and pi bonds each, present in the molecule. (D, What is the hybridization of carbon in the molecule? Explain.arrow_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_forward
- How many nonbonding pairs (or lone-pairs) of electrons are found on the central atom in the Lewis structure of XeF2 molecule? (A) 0 (B) 1 (C) 2 (D) 3arrow_forwardWhich of the following compounds does not contain both ionic and covalent bonding? Justify your answer. (a) Na2SO4(b) NH+NO3(c) NH4C1(d) KCl(e) KclO4arrow_forwardIdentify the electron pair geometry, the molecular structure of each, and the polarity of the following molecules: (a) ClNO (N is the central atom) (b) Cl2CO (C is the central atom) (c) Cl2SO (S is the central atom) (d) SO2F2 (S is the central atom) (e) XeO2F2 (Xe is the central atom) (f) ClOF2 + (Cl is the central atom)arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning