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Final Exam 5-7

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Chemistry Quiz on Final Exam 5-7, created by Brian O'Neill on 13/12/2016.
Brian O'Neill
Quiz by Brian O'Neill, updated more than 1 year ago
Brian O'Neill
Created by Brian O'Neill almost 8 years ago
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Resource summary

Question 1

Question
An ionic bond is best described as
Answer
  • the sharing of electrons
  • the transfer of electrons from one atom to another
  • the attraction that holds the atoms together in a polyatomic ion
  • the attraction between 2 nonmetal atoms
  • the attraction between 2 metal atoms

Question 2

Question
A covalent bond is best described as
Answer
  • the sharing of electrons between atoms.
  • the transfer of electrons
  • a bond between a metal and a nonmetal
  • a bond between a metal and a polyatomic ion
  • a bond between two polyatomic ion

Question 3

Question
Write the name for Sn(SO4)2. Remember that Sn forms several ions
Answer
  • tin (I) sulfite
  • tin (IV) sulfate
  • tin sulfide
  • tin (II) sulfite
  • tin (I) sulfate

Question 4

Question
Give a possible molecular formula for C3H5ClO.
Answer
  • C6H10ClO2
  • C5H10Cl2O2
  • C6H10Cl2O2
  • C6H10O2
  • C6H12Cl2O2

Question 5

Question
Determine the name for TiCO3. Remember that titanium forms several ions
Answer
  • titanium (II) carbonate
  • titanium carbide
  • titanium carbonite
  • titanium (II) carbonite
  • titanium (I) carbonate

Question 6

Question
Give the correct formula for aluminum sulfate.
Answer
  • Al2SO4
  • Al(SO4)3
  • Al3(SO4)2
  • Al2(SO4)3

Question 7

Question
Calculate the molar mass of Ca3(PO4)2
Answer
  • 87.05 g/mol
  • 215.21 g/mol
  • 310.18 g/mol
  • 279.21 g/mol
  • 246.18 g/mol

Question 8

Question
How many atoms of oxygen are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g/mol.
Answer
  • 1.23 × 1023 O atoms
  • 2.96 × 1024 O atoms
  • 2.87 × 1025 O atoms
  • 1.10 × 1024 O atoms
  • 3.68 × 1023 O atoms

Question 9

Question
Calculate the mass percent composition of lithium in Li3PO4
Answer
  • 26.75 %
  • 17.98 %
  • 30.72 %
  • 55.27 %
  • 20.82 %

Question 10

Question
Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2.
Answer
  • C2H5O2
  • C6H15O6
  • C3H7O3
  • C4H10O4
  • C8H20O8

Question 11

Question
Determine the empirical formula for a compound that contains C, H and O. It contains 52.14% C and 34.73% O by mass.
Answer
  • C2H6O
  • CHO
  • C4H13O2
  • CH4O3
  • CH3O

Question 12

Question
Draw the Lewis structure for S2⁻
Answer
  • True
  • False

Question 13

Question
Draw the Lewis structure for Ca2+
Answer
  • True
  • False

Question 14

Question
Draw the Lewis structure for N
Answer
  • True
  • False

Question 15

Question
Give the complete electronic configuration for Br-.
Answer
  • 1s22s22p63s23p64s24p6
  • 1s22s22p63s23p64s24d104p6
  • 1s22s22p63s23p64s23d104p6
  • 1s22s22p63s23p64s23d104p5
  • 1s22s2p63s2p64s23d104p6

Question 16

Question
Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O
Answer
  • Li2O > K2O > Rb2S
  • Li2O > Rb2S > K2O
  • Rb2S > K2O > Li2O
  • Rb2S > Li2O > K2O
  • K2O > Li2O > Rb2S

Question 17

Question
Use Lewis theory to determine the chemical formula for the compound formed between Rb and O
Answer
  • RbO
  • RbO2
  • Rb2O
  • Rb2O3
  • Rb3O2

Question 18

Question
What type of bonding is found in the compound HCl?
Answer
  • covalent bonding
  • hydrogen bonding
  • ionic bonding
  • metallic bonding

Question 19

Question
Which of the following is an ionic compound?
Answer
  • SBr2
  • Mg3(PO4)2
  • Cl2O
  • CH2O
  • PBr5

Question 20

Question
Give the name for PCl3
Answer
  • phosphorus trichloride
  • potassium trichloride
  • phosphorus (III) chloride
  • phosphorus (II) chloride
  • phosphorus chloride

Question 21

Question
A single covalent bond
Answer
  • 0 electron pairs
  • 1 electron pairs
  • 2 electron pairs
  • 3 electron pairs
  • is the shortest
  • 4 electron pairs
  • is the strongest
  • is the weakest
  • does not exist
  • is the longest

Question 22

Question
A double covalent bond
Answer
  • 0 electron pairs
  • 1 electron pairs
  • 2 electron pairs
  • 3 electron pairs
  • is the shortest
  • does not exist
  • is the longest

Question 23

Question
A triple covalent bond
Answer
  • 0 electron pairs
  • 1 electron pairs
  • 2 electron pairs
  • 3 electron pairs
  • is the shortest
  • 4 electron pairs
  • is the strongest
  • is the weakest
  • does not exist
  • is the longest

Question 24

Question
A quadruple covalent bond exists
Answer
  • True
  • False

Question 25

Question
Identify the compound with the largest dipole moment in the gas phase
Answer
  • LiF
  • HF
  • ClF
  • Cl2

Question 26

Question
Identify the compound with the smallest dipole moment in the gas phase
Answer
  • Cl2
  • ClF
  • HF
  • LiF

Question 27

Question
Draw the best Lewis structure for BeF2. State the EG, the MG, and the hybridization for your answer.
Answer
  • True
  • False

Question 28

Question
Using periodic trends, place the following bonds in order of increasing ionic character. Si-P Si-Cl Si-S
Answer
  • Si-P < Si-Cl < Si-S
  • Si-P < Si-S < Si-Cl
  • Si-S < Si-Cl < Si-P
  • Si-Cl < Si-P < Si-S
  • Si-Cl < Si-S < Si-P

Question 29

Question
Give the number of valence electrons for ICl5.
Answer
  • 36
  • 40
  • 42
  • 44
  • 46

Question 30

Question
Draw the best Lewis structure for XeI2. State the EG, the MG, and the hybridization for your answer.
Answer
  • True
  • False

Question 31

Question
Draw the best Lewis structure for SF4. State the EG, the MG, and the hybridization for your answer.
Answer
  • True
  • False

Question 32

Question
Draw the best Lewis structure for NO3⁻. State the EG, the MG, and the hybridization for your answer
Answer
  • True
  • False

Question 33

Question
Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻? (LP=lone pair)
Answer
  • O(2 LP’s) C N (2 LP’s)
  • O(1 LP) C-N(3 LP’s)
  • O(1 LP) C(2 LP’s) N(1 LP)
  • O(3 LP’s)—C N(with 1 LP)
  • They all contribute equally to the correct structure of OCN⁻

Question 34

Question
Place the following in order of increasing F-A-F bond angle, where A represents the central atom in each molecule.
Answer
  • PF3 < OF2 < PF4⁺
  • OF2 < PF4⁺ < PF3
  • PF4⁺ < OF2 < PF3
  • PF4⁺ < PF3 < OF2
  • OF2 < PF3 < PF4⁺

Question 35

Question
How many of the following molecules are polar? PCl5 COS XeO3 SeBr2
Answer
  • 2
  • 1
  • 0
  • 4
  • 3

Question 36

Question
Give the hybridization for the O in OF2. State the EG and the MG for your answer
Answer
  • True
  • False

Question 37

Question
Give the hybridization for the Br in BrF5. State the EG and the MG for your answer
Answer
  • True
  • False

Question 38

Question
A single covalent bond has [blank_start]1[blank_end] sigma and [blank_start]0[blank_end] pi bonds
Answer
  • 1
  • 0

Question 39

Question
A Double covalent bond has [blank_start]1[blank_end] sigma and [blank_start]2[blank_end] pi bonds
Answer
  • 1
  • 1

Question 40

Question
A triple covalent bond has [blank_start]1[blank_end] sigma and [blank_start]2[blank_end] pi bonds
Answer
  • 1
  • 2

Question 41

Question
Describe a pi bond
Answer
  • side by side overlap of parallel p orbitals
  • s orbital overlapping with the end of a d orbital
  • end to end overlap of p orbitals
  • overlap of two d orbitals
  • p orbital overlapiing with an f orbital

Question 42

Question
describe a sigma bond
Answer
  • end to end overlap of p orbitals
  • s orbital overlapping with the side of a p orbital
  • overlap of two d orbitals
  • p orbital overlapping with an f orbital
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