chem9

title = q8a12 Propylene has the "condensed structural formula" CH2CHCH3. Note that in this condensed structure, the hydrogens are bonded as terminal atoms to the carbons atom in front of them, while all the carbon atoms are connected to one another in the order shown. Draw the Lewis structure for propylene. In this structure, there are ___(i)_____ C-C sigma bonds and ____(ii)_____ C-C pi bonds.

(i) 2; (ii) 1

title = q6a7 ICl2- is ____(i)____ and SCl2 is ______(ii)________.

(i) nonpolar; (ii) polar

title = q10a2 The following is the structure of acetone, which is used as a common solvent. According to valence bond theory, what hybridizations would you predict for the indicated atoms of acetone?

(i) sp3; (ii) sp2; (iii) sp2

title = q7a10 What are the orbital hybridizations on bromine in the following compounds: (i) BrF3, (ii) BrF5?

(i) sp3d; (ii) sp3d2

title = q7a9 For carbon dioxide, the hybridization on C is ____(i)_______ and the hybridization on O is _____(ii)________.

(i) sp; (ii) sp2

title = q9a1 The angles in a perfect tetrahedron are 109.5°, and those for a trigonal plane are 120°. Based on its Lewis structure, what would you predict for the bond angles in ammonia, NH3?

107°

title = q2a3 How many total molecular geometries are possible for an atom surrounded by 3 electron domains?

2

title = q2a7 For which of the following formulas, where A is the central atom and X is a terminal atom, can the electron-domain and molecular geometries differ? Select all the correct answers, this is a multiple response question.

AX2 AX3 AX4 AX5

title = q5a2 Which of the following molecules does NOT have a tetrahedral electron domain geometry?

ICl4-

title = q5a1 Which of the following molecules does NOT have a trigonal planar molecular geometry?

PF3

title = q4a9 What is the molecular geometry in ClF3?

T shaped

title = q1a2 Which of the following are essential tenets of valence shell electron pair repulsion (VSEPR) theory?

both (b) and (c) are correct

title = q8a3 For the sulfate ion drawn in the form where the central S atom bears a formal charge of 0, there are:

four sigma bonds and two pi bonds

title = q10a4 The following is the structure of acetic acid (vinegar). According to valence bond theory, what hybridizations would you predict for the indicated atoms?

i sp3; ii sp2; iii sp2

title = q3a8 What is the electron-domain geometry about the central atom (N) of N3-?

linear

title = q9a11 Based on the Lewis structure of the nitrate ion, and your knowledge of VSEPR, which statement most accurately estimates the bond angles about the central N?

they are all exactly 120°

title = q3a10 What is the electron-domain geometry about the central atom (C) of CO32-?

trigonal planar

title = q4a7 What is the molecular geometry in the sulfite ion, SO32-?

trigonal pyramidal