Based on electronegativities, which one of the following would have ionic bonds? Select one: a. O2 b. MgO c. H20 O d. SiO2 Ge. CF4

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A east.cengagenow.com 103 003 General ChemistryI C OWLV2 | Online teaching and learning resource from Cengage Learning [References] Use the References to access important values if needed for this question. Please note that "geometry" refers to the molecular or ionic geometry. H-N-H A. The Lewis diagram for NH3 is: The electron-pair geometry around the N atom in NH3 is There are lone pair(s) around the central atom, so the geometry of NH3 is 13- :0: B. The Lewis diagram for PO,* is: :0: The electron-pair geometry around the P atom in PO is There are lone pair(s) around the central atom, so the geometry of PO, is Submit Answer Try Another Version 5 item attempts remaining Cengage Learning | Cengage Technical Support

QUESTION 38 What is the approximate bond angle in NBr2"? a. 90° b. 120° c. 180° d. 109° QUESTION 39 Which molecule below has a dipole moment? 1. CO2 II. SO2 III. PF5 a. Il only b. Both I and III Oc. Ill only d. I only QUESTION 40 The bond in HF is best described as what type? a. hydrogen b. covalent c. polar covalent d. ionic

Please answer number 4 a B C D

8. For each molecular fomula, detem ine the electron pair geom etry (EPG), make a 3-dimensional representation, and determ ine the molecular geometry. Determine whether the molecule is polar or non- polar. All of these have central atoms surounded by term inal atom s/one pairs only. Formula A. CHF3 Lewis structure EPG 3-D drawing Mol Geom. Polar molecule? B. SF2

1. Which of the following molecules contain(s) a polar bond? ОН III IV а. I, II and IІ. b. I, II and IV. c. II, III and IV. d. III, IV and V.

11. Choose the compound below that contains at least one polar covalent bond but is nonpolar. A. HCN  B. CF4   C. SeBr4   D. ICl3   E. Both B and C

116) Write Lewis structures and predict whether each of the following is polar or nonpolar. a. HOCN (exists as HO−CN) c. XeF2e. SeF6 b. COSd. CF2Cl2f. H2CO (C is the central atom)

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