(A) bonding pair (D) homogeneous mixture 1. Two or more different elements chemically combined make a(n) (C) compound (E) heterogeneous mixture (B) isotope 2. The formula of a compound (A) must be electrically neutral (B) is written as a combination of elemental symbols (C) may contain subscripts specifying the number of each kind of atom (D) reveals whether the compound is ionic or covalent (E) all of these 3. A reaction in which a fuel burns in the presence of oxygen to form carbon dioxide and water vapor is the specific type of reaction called a (A) redox reaction. (B) combustion (C) acid-base (D) single replacement (E) precipitation 4. A certain covalent molecule, of general formula AT,, follows the Octet Rule. What can we reasonably conclude about its geometry? (A) the geometry is bent with a bond angle of either 120°or 180° (B) the molecule must be tetrahedral since there is only one possibility for this formula (C) the geometry is octahedral if the central atom A has one lone pair

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter3: Atomic Shells And Classical Models Of Chemical Bonding
Section: Chapter Questions
Problem 97AP
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1. Two or more diffferent elements chemically combined make a(n)
(C) compound
(E) heterogeneous mixture
(A) bonding pair
(D) homogeneous mixture
(B) isotope
2. The formula of a compound
(A) must be electrically neutral
(B) is written as a combination of elemental symbols
(C) may contain subscripts specifying the number of each kind of atom
(D) reveals whether the compound is ionic or covalent
(E) all of these
3. A reaction in which a fuel burns in the presence of oxygen to form carbon dioxide and water
vapor is the specific type of reaction called a
(A) redox
reaction.
(B) combustion
(C) acid-base
(D) single replacement (E) precipitation
4. A certain covalent molecule, of general formula AT,, follows the Octet Rule. What can we
reasonably conclude about its geometry?
(A) the geometry is bent with a bond angle of either 120°or 180°
(B) the molecule must be tetrahedral since there is only one possibility for this formula
(C) the geometry is octahedral if the central atom A has one lone pair
(D) the predicted geometry is trigonal planar if there are no lone pairs on the central atom A
(E) all the T-A-T bond angles are 120° if the central atom A has one lone pair
5. Given the following unbalanced equation, what would be the coefficient of LiF after the
equation is balanced using the smallest set of whole numbers?
BF, +
Li,SO,
+ _B,(SO,), +
LiF
-
-
(A) 2
(B) 3
(C) 6
(D) 9
(E) 1
.6. What is the idealized bond angle for the tetrahedral geometry?
(C) 60°
(A) 109.5°
(B) 90°
(D) 180°
(E) 120°
7. Given the following balanced equation, how many moles of Al are required to produce
2.50 mol of H,?
6 N2OH + 2 AI
3 H, + 2 Na,AIo,
(A) 7.50 mol Al
(B) 3.75 mol Al
(C) 1.83 mol Al
(D) 1.67 mol Al
(E) 3.00 mol Al
Transcribed Image Text:1. Two or more diffferent elements chemically combined make a(n) (C) compound (E) heterogeneous mixture (A) bonding pair (D) homogeneous mixture (B) isotope 2. The formula of a compound (A) must be electrically neutral (B) is written as a combination of elemental symbols (C) may contain subscripts specifying the number of each kind of atom (D) reveals whether the compound is ionic or covalent (E) all of these 3. A reaction in which a fuel burns in the presence of oxygen to form carbon dioxide and water vapor is the specific type of reaction called a (A) redox reaction. (B) combustion (C) acid-base (D) single replacement (E) precipitation 4. A certain covalent molecule, of general formula AT,, follows the Octet Rule. What can we reasonably conclude about its geometry? (A) the geometry is bent with a bond angle of either 120°or 180° (B) the molecule must be tetrahedral since there is only one possibility for this formula (C) the geometry is octahedral if the central atom A has one lone pair (D) the predicted geometry is trigonal planar if there are no lone pairs on the central atom A (E) all the T-A-T bond angles are 120° if the central atom A has one lone pair 5. Given the following unbalanced equation, what would be the coefficient of LiF after the equation is balanced using the smallest set of whole numbers? BF, + Li,SO, + _B,(SO,), + LiF - - (A) 2 (B) 3 (C) 6 (D) 9 (E) 1 .6. What is the idealized bond angle for the tetrahedral geometry? (C) 60° (A) 109.5° (B) 90° (D) 180° (E) 120° 7. Given the following balanced equation, how many moles of Al are required to produce 2.50 mol of H,? 6 N2OH + 2 AI 3 H, + 2 Na,AIo, (A) 7.50 mol Al (B) 3.75 mol Al (C) 1.83 mol Al (D) 1.67 mol Al (E) 3.00 mol Al
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