Question 1

What is the mass percent of H2O in magnesium chloride hexahydrate?

Accepted Answer

A) 10.7% 
B) 64.4% 
C) 8.86% 
D) 26.6% 
E) 53.2% 
A) 10.7% 
B) 64.4% 
C) 8.86% 
D) 26.6% 
E) 53.2%

Question 2

What is the formula of sodium hypochlorite?

Accepted Answer

A) NaCl 
B) NaClO 
C) NaClO2 
D) NaClO3 
E) NaClO4 
A) NaCl 
B) NaClO 
C) NaClO2 
D) NaClO3 
E) NaClO4

Question 3

A 200.0 g sample of pure MgCl2 contains:

Accepted Answer

A) 95.211 formula units MgCl2  
B) 2.101 formula units MgCl2  
C) 1.265 × 1024 formula units MgCl2  
D) 1.204 × 1026 formula units MgCl2  
E) 5.734 × 1025 formula units MgCl2  
A) 95.211 formula units MgCl2  
B) 2.101 formula units MgCl2  
C) 1.265 × 1024 formula units MgCl2  
D) 1.204 × 1026 formula units MgCl2  
E) 5.734 × 1025 formula units MgCl2

Question 4

Which of the compounds,C4H10,BaCl2,Ni(NO3)2,SF6, are expected to exist as molecules?

Accepted Answer

A) only C4H10 
B) C4H10 and SF6 
C) C4H10,Ni(NO3)2,and SF6 
D) BaCl2 and Ni(NO3)2 
A) only C4H10 
B) C4H10 and SF6 
C) C4H10,Ni(NO3)2,and SF6 
D) BaCl2 and Ni(NO3)2

Question 5

Only metals in binary compounds use prefixes such as di-,tri-,tetra-,etc.

Accepted Answer

A) True 
 B)False

Question 6

A molecule is a group of bonded atoms that exist as an entity.

Accepted Answer

A) True 
 B)False

Question 7

The chemical formula for the selenite ion is:

Accepted Answer

A) Se- 
B) Se2- 
C) SeO32- 
D) SeO42- 
A) Se- 
B) Se2- 
C) SeO32- 
D) SeO42-

Question 8

The chemical formula for sulfurous acid is:

Accepted Answer

A) H2S 
B) H2SO3 
C) HSO4 
D) H2S2O7 
A) H2S 
B) H2SO3 
C) HSO4 
D) H2S2O7

Question 9

Oxidation state is related to the number of protons involved in bonding.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following functional groups gives acidic properties to organic molecules?

Accepted Answer

A) -C(O)CH3 
B) -COOCH3 
C) -COOH 
D) -C(O)H 
E) -CH2OH 
A) -C(O)CH3 
B) -COOCH3 
C) -COOH 
D) -C(O)H 
E) -CH2OH

Question 11

The material Styrofoam is made by blowing a gas into the polymer polystyrene made from styrene.Styrene has the percent composition of C 92.26% and H 7.74% and 1.41*1022
Molecules weigh 2.44 grams.What is the molecular formula for styrene?

Accepted Answer

A) CH 
B) C2H2  
C) C8H8  
D) C4H4  
E) C6H6  
A) CH 
B) C2H2  
C) C8H8  
D) C4H4  
E) C6H6

Question 12

What is the correct name for the following organic structure?
CH3C(CH3)2CH3

Accepted Answer

A) pentane 
B) 2,2-dimethylpropane 
C) 2-methylbutane 
D) 1,3-dimethylpropane 
E) 2-ethylpropane 
A) pentane 
B) 2,2-dimethylpropane 
C) 2-methylbutane 
D) 1,3-dimethylpropane 
E) 2-ethylpropane

Question 13

The compound NO is named:

Accepted Answer

A) nitrate 
B) nitrite 
C) nitrogen monoxide 
D) nitrogen(IV)oxide 
A) nitrate 
B) nitrite 
C) nitrogen monoxide 
D) nitrogen(IV)oxide

Question 14

Elemental analysis of 50.0000 g of a compound showed that it contained 12.7520 g C,3.2105 g H,and the rest was S.The empirical formula of this compound is ________.

Accepted Answer

A) CHS 
B) CH2S 
C) CH3S 
D) C2H2S 
E) C2H3S2  
A) CHS 
B) CH2S 
C) CH3S 
D) C2H2S 
E) C2H3S2

Question 15

Which of the following are isomers?

Accepted Answer

A) CH3CH(CH2CH3)CH2CH2CH3 and CH3CH(CH3)CH2CH2CH3  
B) CH3CH(OH)CH2CH2CH3 and CH3CH(CH3)CH2CH2CH3  
C) CH3CH(OH)CH2CH2CH3 and CH3CH(OH)CH2CH(CH3)CH3  
D) CH3CH(OH)CH2CH2CH3 and CH3CH(CH3)CH2CH2OH 
E) CH3CH(CH3)CH2CH(CH3)CH3 and CH3CH2CH2CH2CH3  
A) CH3CH(CH2CH3)CH2CH2CH3 and CH3CH(CH3)CH2CH2CH3  
B) CH3CH(OH)CH2CH2CH3 and CH3CH(CH3)CH2CH2CH3  
C) CH3CH(OH)CH2CH2CH3 and CH3CH(OH)CH2CH(CH3)CH3  
D) CH3CH(OH)CH2CH2CH3 and CH3CH(CH3)CH2CH2OH 
E) CH3CH(CH3)CH2CH(CH3)CH3 and CH3CH2CH2CH2CH3

Question 16

An unknown organic compound contains carbon,hydrogen,and bromine only.The mass percentages of C and H are 12.77% C and 1.60% H.Bromine from 1.87 g of this compound has been completely converted into 3.70 g of AgBr.The molar mass of unknown organic compound is 188 u.Determine the molecular formula of the unknown.

Accepted Answer

A) CH3Br  
B) C2H3Br2  
C) C2H2Br2  
D) C2H2Br4  
E) C4H6Br4  
A) CH3Br  
B) C2H3Br2  
C) C2H2Br2  
D) C2H2Br4  
E) C4H6Br4

Question 17

White phosphorus,P4,spontaneously bursts into flame in oxygen.If 6.500 g of white phosphorus reacts with oxygen to form 11.54 g of a phosphorus oxide,what is the empirical formula of this oxide?

Accepted Answer

A) P2O3 
B) PO3 
C) P2O6 
D) P4O6 
A) P2O3 
B) PO3 
C) P2O6 
D) P4O6

Question 18

The oxidation state of iodine in orthoparaperiodic acid,H5IO6, is ________.

Accepted Answer

A) +1 
B) -1 
C) +5 
D) +7 
E) -7 
A) +1 
B) -1 
C) +5 
D) +7 
E) -7

Question 19

Crystals from evaporation of urine analyze to 22.6% phosphorus.Which compound is probably present?

Accepted Answer

A) NaNH4HPO4  
B) (NH4)3PO4  
C) Na3PO4  
D) H3PO4  
E) Ca3(PO4)2  
A) NaNH4HPO4  
B) (NH4)3PO4  
C) Na3PO4  
D) H3PO4  
E) Ca3(PO4)2

Question 20

The oxidation state of silver in the complex ion Ag(CN)   Is ________.

Accepted Answer

A) -1 
B) +1 
C) 0 
D) +2 
E) -2 
A) -1 
B) +1 
C) 0 
D) +2 
E) -2

Exam 3: Chemical Compounds

What is the mass percent of H2O in magnesium chloride hexahydrate?

What is the formula of sodium hypochlorite?

A 200.0 g sample of pure MgCl2 contains:

Which of the compounds,C4H10,BaCl2,Ni(NO3)2,SF6, are expected to exist as molecules?

Only metals in binary compounds use prefixes such as di-,tri-,tetra-,etc.

A molecule is a group of bonded atoms that exist as an entity.

The chemical formula for the selenite ion is:

The chemical formula for sulfurous acid is:

Oxidation state is related to the number of protons involved in bonding.

Which of the following functional groups gives acidic properties to organic molecules?

The material Styrofoam is made by blowing a gas into the polymer polystyrene made from styrene.Styrene has the percent composition of C 92.26% and H 7.74% and 1.41*1022 Molecules weigh 2.44 grams.What is the molecular formula for styrene?

What is the correct name for the following organic structure? CH3C(CH3)2CH3

The compound NO is named:

Elemental analysis of 50.0000 g of a compound showed that it contained 12.7520 g C,3.2105 g H,and the rest was S.The empirical formula of this compound is ________.

Which of the following are isomers?

White phosphorus,P4,spontaneously bursts into flame in oxygen.If 6.500 g of white phosphorus reacts with oxygen to form 11.54 g of a phosphorus oxide,what is the empirical formula of this oxide?

The oxidation state of iodine in orthoparaperiodic acid,H5IO6, is ________.

Crystals from evaporation of urine analyze to 22.6% phosphorus.Which compound is probably present?

The oxidation state of silver in the complex ion Ag(CN) Is ________.

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

What is the mass percent of H₂O in magnesium chloride hexahydrate?

A 200.0 g sample of pure MgCl₂ contains:

Which of the compounds,C₄H₁₀,BaCl₂,Ni(NO₃)₂,SF_6, are expected to exist as molecules?

The material Styrofoam is made by blowing a gas into the polymer polystyrene made from styrene.Styrene has the percent composition of C 92.26% and H 7.74% and 1.41*10²² Molecules weigh 2.44 grams.What is the molecular formula for styrene?

What is the correct name for the following organic structure? CH₃C(CH₃)₂CH₃

White phosphorus,P₄,spontaneously bursts into flame in oxygen.If 6.500 g of white phosphorus reacts with oxygen to form 11.54 g of a phosphorus oxide,what is the empirical formula of this oxide?

The oxidation state of iodine in orthoparaperiodic acid,H₅IO_6, is ________.