What theory explains molecular shapes or geometry?

Valence Shell Electron Pair Repulsion Theory, VSEPR

What is the bond polarity for each bond in C2H5Cl?

C-C: nonpolar; C-H: nonpolar; C-Cl: polar

What direction does a dipole point?

to the most electronegative element

What shape is CH3Cl, how many lone pairs does it have on the central atom, and what is its molecular polarity?

Tetrahedral, 0 lone pairs, polar

The polar shapes have been starred - pick the correct choice!

Linear,bent*,trigonal planar,trigonal pyramidal*,tetrahedral

What causes the difference in shape between trigonal planar and pyramidal?

Lone pair on the central atom of pyramidal repel e- in bond.

What is the molecular shape for H2S and BCl3

H2S (bent) and BCl3 (trigonal planar)

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Chemistry

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Questions 21

Answers

1
What is the molecular formula for heptasulfur nonoxide and tetraphosphorus trisulfide?
S9O7, P4S3
S4O3, P7S9
S7O9, P3S4
S7O9, P4S3
2
What are the chemical formulas for oxygen and Fluorine?
O2, F2
O, F
3
What is the name for HF?
Hydrogen monofluoride
Hydrogen fluoride
monohydrogen monofluoride
monohydrogen fluoride
4
What theory explains molecular shapes or geometry?
Valence Shell Electron Pair Repulsion Theory
VSEPR
Who knows?
5
What is the name for K₂O?
Potassium monoxide
Potassium oxide
dipotassium oxide
dipotassium monoxide
6
Generally speaking, which of these IMFs is the weakest?
dipole-dipole
ion-dipole
Hydrogen bonding
London dispersion forces
7
How many valence electrons are needed to draw the Lewis structure for carbon dioxide?
16
24
8
20
8
Draw the Lewis Dot structure for CS₂ and identify its molecular shape.
Trigonal pyramidal
Linear
Bent
Tetrahedral
9
What is the name for Br₂
dibromine
Bromine
10
What is the bond polarity for each bond in C₂H₅Cl?
C-C: nonpolar; C-H: nonpolar; C-Cl: nonpolar
C-C: polar; C-H: polar; C-Cl: polar
C-C: nonpolar; C-H: nonpolar; C-Cl: polar
C-C: nonpolar; C-H: polar; C-Cl: polar
11
What is the name for
Carbon monoxide
Carbon oxide
monocarbon oxide
monocarbon monoxide
12
What direction does a dipole point?
to the most electronegative element
to the largest ionic radius
to the element with the largest radius
to the least electronegative element
13
What is the name for C₄H₁₀?
tetracarbon decahydride
tetracarbide decahydrogen
tricarbon decahydride
tetracarbon decahydrogen
14
What shape is CH₃Cl, how many lone pairs does it have on the central atom, and what is its molecular polarity?
Tetrahedral, 0 lone pairs, nonpolar
Tetrahedral, 0 lone pairs, polar
Tetrahedral, 3 lone pairs, polar
Tetrahedral, 3 lone pairs, nonpolar
15
The polar shapes have been starred - pick the correct choice!
Linear,bent*,trigonal planar,trigonal pyramidal,tetrahedral*
Linear*,bent,trigonal planar*,trigonal pyramidal,tetrahedral
Linear,bent*,trigonal planar,trigonal pyramidal*,tetrahedral
Linear,bent,trigonal planar*,trigonal pyramidal*,tetrahedral
16
What is the chemical formula for sodium nitrite?
NaNO3
NaNO2
NaNO
Na3N
17
What is the molecular polarity for BI₃?
Polar - asymmetrical
Nonpolar - symmetrical
18
uneven distribution of electron density.
Elements
Polar molecule
Ionic bond
Solute
19
What causes the difference in shape between trigonal planar and pyramidal?
Lone pair on the central atom of planar repel e- in bond.
Lone pair on the central atom of pyramidal repel e- in bond.
Lone pairs on outside atoms of pyramidal repel e- in bond.
Ummmm?
20
what is intermolecular forces?
Atoms attratected to each other
Repulsion force
Forces between Atoms within a molecule
Forces between Molecules
21
What is the molecular shape for H₂S and BCl₃
H2S (bent) and BCl3 (trigonal pyramidal)
H2S (Linear) and BCl3 (trigonal planar)
H2S (bent) and BCl3 (trigonal planar)
H2S (trigonal planar) and BCl3 (bent)

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