Question 1

Give a possible molecular formula for C3H5ClO.

Accepted Answer

A)  C6H10ClO2 
B)  C5H10Cl2O2 
C)  C6H10Cl2O2 
D)  C6H10O2 
E)  C6H12Cl2O2 
A)  C6H10ClO2 
B)  C5H10Cl2O2 
C)  C6H10Cl2O2 
D)  C6H10O2 
E)  C6H12Cl2O2

Question 2

Write the formula for copper (II)sulfate pentahydrate.

Accepted Answer

A)  Cu2SO3∙H5 
B)  Cu2S∙H2O 
C)  CuS∙5H2O 
D)  (CuSO4)5 
E)  CuSO4∙5H2O 
A)  Cu2SO3∙H5 
B)  Cu2S∙H2O 
C)  CuS∙5H2O 
D)  (CuSO4)5 
E)  CuSO4∙5H2O

Question 3

What is the empirical formula of a substance that contains 5.28 g of C,1.11 g of H,and 3.52 g of O?

Accepted Answer

A)  C2H5O  
B)  C2H4O2 
C)  C2H4O3 
D)  C3H4O4 
A)  C2H5O  
B)  C2H4O2 
C)  C2H4O3 
D)  C3H4O4

Question 4

Give the mass percent of hydrogen in C14H19NO2.

Accepted Answer

A)  8.21% 
B)  6.00% 
C)  13.72% 
D)  72.07% 
A)  8.21% 
B)  6.00% 
C)  13.72% 
D)  72.07%

Question 5

Which one of the following compounds contains ionic bonds?

Accepted Answer

A)  BaO 
B)  H I 
C)  N H3 
D)  CO2 
A)  BaO 
B)  H I 
C)  N H3 
D)  CO2

Question 6

Identify the compound with covalent bonding.

Accepted Answer

A)  Na Cl 
B)  K 
C)  H2O 
D)  He 
E)  S 
A)  Na Cl 
B)  K 
C)  H2O 
D)  He 
E)  S

Question 7

Calculate the mass percent composition of magnesium in Mg(NO3)2.

Accepted Answer

A)  32.6% 
B)  16.4 % 
C)  8.92 % 
D)  27.5 % 
E)  83.6 % 
A)  32.6% 
B)  16.4 % 
C)  8.92 % 
D)  27.5 % 
E)  83.6 %

Question 8

A compound was isolated and found to contain 72.2% magnesium and the rest nitrogen.What is the empirical formula of this compound?

Accepted Answer

A)  Mg3N2 
B)  MgN3 
C)  MgN 
D)  Mg2N3 
E)  Mg3N 
A)  Mg3N2 
B)  MgN3 
C)  MgN 
D)  Mg2N3 
E)  Mg3N

Question 9

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO2.

Accepted Answer

A)  N2O3 
B)  N3O6 
C)  N2O4 
D)  NO2 
E)  N2O5 
A)  N2O3 
B)  N3O6 
C)  N2O4 
D)  NO2 
E)  N2O5

Question 10

Write the formula for magnesium nitrite.

Accepted Answer

A)  Mg3N2 
B)  MgNO3 
C)  MgN 
D)  Mg(NO2)2 
E)  Mg(NO2)3 
A)  Mg3N2 
B)  MgNO3 
C)  MgN 
D)  Mg(NO2)2 
E)  Mg(NO2)3

Question 11

The chemical formula for barium nitride is

Accepted Answer

A)  Ba(NO3)2. 
B)  Ba(NO2)2. 
C)  Ba3N2. 
D)  BaN2. 
A)  Ba(NO3)2. 
B)  Ba(NO2)2. 
C)  Ba3N2. 
D)  BaN2.

Question 12

Give the formula for calcium bisulfate.

Accepted Answer

A)  CaHSO4 
B)  Ca2(HSO4)2 
C)  Ca2HSO4 
D)  Ca(HSO4)2 
A)  CaHSO4 
B)  Ca2(HSO4)2 
C)  Ca2HSO4 
D)  Ca(HSO4)2

Question 13

Which of the following compounds is nail polish remover?

Accepted Answer

A)  (CH3)2C=O 
B)  C2H5OH 
C)  CH3CO2H 
D)  CH3CO2CH3 
E)  CH3OCH3 
A)  (CH3)2C=O 
B)  C2H5OH 
C)  CH3CO2H 
D)  CH3CO2CH3 
E)  CH3OCH3

Question 14

Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2.

Accepted Answer

A)  C2H5O2 
B)  C6H15O6 
C)  C3H7O3 
D)  C4H10O4 
E)  C8H20O8 
A)  C2H5O2 
B)  C6H15O6 
C)  C3H7O3 
D)  C4H10O4 
E)  C8H20O8

Question 15

Use Lewis theory to determine the chemical formula for the compound formed between Rb and O.

Accepted Answer

A)  Rb O 
B)  Rb O2 
C)  Rb2O 
D)  Rb2O3 
E)  Rb3O2 
A)  Rb O 
B)  Rb O2 
C)  Rb2O 
D)  Rb2O3 
E)  Rb3O2

Question 16

How many anions are there in 3.50 g of MgBr2?

Accepted Answer

A)  1.14 × 1022 anions 
B)  2.29 × 1022 anions 
C)  3.17 × 1025 anions 
D)  6.34 × 1025 anions 
A)  1.14 × 1022 anions 
B)  2.29 × 1022 anions 
C)  3.17 × 1025 anions 
D)  6.34 × 1025 anions

Question 17

Give the structure for lithium hypo iodite.

Accepted Answer

A)  LI IO 
B)  LI IO2 
C)  LI IO3 
D)  LI IO4 
A)  LI IO 
B)  LI IO2 
C)  LI IO3 
D)  LI IO4

Question 18

The compound,SO3,is named

Accepted Answer

A)  sulfate. 
B)  sulfite. 
C)  sulfur trioxide. 
D)  sulfur ( VI) oxide. 
A)  sulfate. 
B)  sulfite. 
C)  sulfur trioxide. 
D)  sulfur ( VI) oxide.

Question 19

How many millimoles of Ca(NO3)2 contain 4.78 × 1022 formula units of Ca(NO3)2? The molar mass of Ca(NO3)2 is 164.10 g/mol.

Accepted Answer

A)  12.6 mmol Ca(NO3)2 
B)  13.0 mmol Ca(NO3)2 
C)  20.7 mmol Ca(NO3)2 
D)  79.4 mmol Ca(NO3)2 
E)  57.0 mmol Ca(NO3)2 
A)  12.6 mmol Ca(NO3)2 
B)  13.0 mmol Ca(NO3)2 
C)  20.7 mmol Ca(NO3)2 
D)  79.4 mmol Ca(NO3)2 
E)  57.0 mmol Ca(NO3)2

Question 20

Which of the following compounds is vinegar?

Accepted Answer

A)  C2H6 
B)  C2H5OH 
C)  CH3CO2H 
D)  CH3CO2CH3 
E)  CH3NHCH3 
A)  C2H6 
B)  C2H5OH 
C)  CH3CO2H 
D)  CH3CO2CH3 
E)  CH3NHCH3

Exam 5: Molecules and Compounds

Give a possible molecular formula for C3H5ClO.

Write the formula for copper (II)sulfate pentahydrate.

What is the empirical formula of a substance that contains 5.28 g of C,1.11 g of H,and 3.52 g of O?

Give the mass percent of hydrogen in C14H19NO2.

Which one of the following compounds contains ionic bonds?

Identify the compound with covalent bonding.

Calculate the mass percent composition of magnesium in Mg(NO3)2.

A compound was isolated and found to contain 72.2% magnesium and the rest nitrogen.What is the empirical formula of this compound?

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO2.

Write the formula for magnesium nitrite.

The chemical formula for barium nitride is

Give the formula for calcium bisulfate.

Which of the following compounds is nail polish remover?

Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2.

Use Lewis theory to determine the chemical formula for the compound formed between Rb and O.

How many anions are there in 3.50 g of MgBr2?

Give the structure for lithium hypo iodite.

The compound,SO3,is named

How many millimoles of Ca(NO3)2 contain 4.78 × 1022 formula units of Ca(NO3)2? The molar mass of Ca(NO3)2 is 164.10 g/mol.

Which of the following compounds is vinegar?

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Thermochemistry

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Give a possible molecular formula for C₃H₅ClO.

Give the mass percent of hydrogen in C₁₄H₁₉NO₂.

Calculate the mass percent composition of magnesium in Mg(NO₃)₂.

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO₂.

Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C₂H₅O₂.

How many anions are there in 3.50 g of MgBr₂?

The compound,SO₃,is named

How many millimoles of Ca(NO₃)₂ contain 4.78 × 10²² formula units of Ca(NO₃)₂? The molar mass of Ca(NO₃)₂ is 164.10 g/mol.