Question 1

A sample contains 52.0 g of elemental phosphorus, P4. Determine the number of moles of P4 and the number of atoms of phosphorus present in the sample.

Accepted Answer

A)  0.419 moles, 2.52 × 1023 atoms 
B)  1.68 moles, 1.01 × 1024 atoms 
C)  0.419 moles, 1.01 × 1024 atoms 
D)  1.68 moles, 4.04 × 1024 atoms 
E)  0.419 moles, 2.79 × 10-24 atoms 
A)  0.419 moles, 2.52 × 1023 atoms 
B)  1.68 moles, 1.01 × 1024 atoms 
C)  0.419 moles, 1.01 × 1024 atoms 
D)  1.68 moles, 4.04 × 1024 atoms 
E)  0.419 moles, 2.79 × 10-24 atoms

Question 2

Name the alkane with the formula C3H8.

Accepted Answer

Question 3

A hydrocarbon contains 79.89% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

Accepted Answer

A)  C2H5 
B)  CH3 
C)  C3H8 
D)  C4H10 
E)  C5H12 
A)  C2H5 
B)  CH3 
C)  C3H8 
D)  C4H10 
E)  C5H12

Question 4

The formula CH3CH2CH2OH is an example of a(n):

Accepted Answer

A)  structural formula. 
B)  functional group formula. 
C)  inorganic formula. 
D)  ball and stick model. 
E)  condensed formula. 
A)  structural formula. 
B)  functional group formula. 
C)  inorganic formula. 
D)  ball and stick model. 
E)  condensed formula.

Question 5

Which compound is incorrectly named?

Accepted Answer

A)  Ni(NO3)2 nickel(II) nitrate 
B)  Al2(SO4)3 aluminum sulfate 
C)  Mg3(PO4)2 magnesium phosphate 
D)  Ba(OH)2 barium(II) hydroxide 
E)  KCl potassium chloride 
A)  Ni(NO3)2 nickel(II) nitrate 
B)  Al2(SO4)3 aluminum sulfate 
C)  Mg3(PO4)2 magnesium phosphate 
D)  Ba(OH)2 barium(II) hydroxide 
E)  KCl potassium chloride

Question 6

Determine the percent potassium present in K2SO4.

Accepted Answer

A)  22.4% 
B)  28.9% 
C)  44.9% 
D)  57.9% 
E)  None of these 
A)  22.4% 
B)  28.9% 
C)  44.9% 
D)  57.9% 
E)  None of these

Question 7

Give the formula for the ionic compound that forms between strontium and fluorine.

Accepted Answer

A)  Sr2F 
B)  Sr2F3 
C)  Sr2F4 
D)  SrF 
E)  SrF2 
A)  Sr2F 
B)  Sr2F3 
C)  Sr2F4 
D)  SrF 
E)  SrF2

Question 8

Which of the following are constitutional isomers?

Accepted Answer

A)  CH2O and C6H12O6 
B)  C3H8 and CH3CH2CH3 
C)  C2H5OH and CH3OCH3 
D)  C2H4 and C2H6 
E)  C6H5OH and C6H4(OH)2 
A)  CH2O and C6H12O6 
B)  C3H8 and CH3CH2CH3 
C)  C2H5OH and CH3OCH3 
D)  C2H4 and C2H6 
E)  C6H5OH and C6H4(OH)2

Question 9

Ions that contain atoms of more than two elements are called _____________ ions.

Accepted Answer

The answer of Ions that contain atoms of more than...

Question 10

Which of the following is not a binary compound?

Accepted Answer

A)  H2O 
B)  CaCl2 
C)  NH3 
D)  HCN 
E)  NaBr 
A)  H2O 
B)  CaCl2 
C)  NH3 
D)  HCN 
E)  NaBr

Question 11

An organic compound has an empirical formula of CH2O and had an approximate molecular weight of 117. What is its molecular formula?

Accepted Answer

A)  C3.9H7.8O3.9 
B)  C3.9H3.9O3.9 
C)  C4H4O4 
D)  C8H4O8 
E)  C4H8O4 
A)  C3.9H7.8O3.9 
B)  C3.9H3.9O3.9 
C)  C4H4O4 
D)  C8H4O8 
E)  C4H8O4

Question 12

A hydrocarbon contains 85.7% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

Accepted Answer

A)  CH 
B)  CH2 
C)  CH3 
D)  C2H 
E)  C2H3 
A)  CH 
B)  CH2 
C)  CH3 
D)  C2H 
E)  C2H3

Question 13

An organic compound has an empirical formula of C2H3O and had an approximate molecular weight of 86. What is its molecular formula?

Accepted Answer

A)  C2H3O 
B)  C4H6O2 
C)  C6H8O3 
D)  C8H12O4 
E)  C10H14O5 
A)  C2H3O 
B)  C4H6O2 
C)  C6H8O3 
D)  C8H12O4 
E)  C10H14O5

Question 14

A hydrate of magnesium sulfate, MgSO4·nH2O, loses 37.4% of its mass upon heating. The mass loss can be considered to be only water. What is the value of n if all of the water was lost?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 15

Which compound is incorrectly named?

Accepted Answer

A)  C8H18 octane 
B)  C7H16 hexane 
C)  C5H12 pentane 
D)  C4H10 butane 
E)  C3H8 propane 
A)  C8H18 octane 
B)  C7H16 hexane 
C)  C5H12 pentane 
D)  C4H10 butane 
E)  C3H8 propane

Question 16

Determine the percent carbon in the acetate ion CH3COO-.

Accepted Answer

A)  24.0% 
B)  59.0% 
C)  20.3% 
D)  40.7% 
E)  59.3% 
A)  24.0% 
B)  59.0% 
C)  20.3% 
D)  40.7% 
E)  59.3%

Question 17

Name the compound with the formula VCl3.

Accepted Answer

vanadium(I

Question 18

Which combination below corresponds to the H+ ion?

Accepted Answer

A)  2 protons and 1 electron 
B)  1 proton and 2 electrons 
C)  2 protons and 3 electrons 
D)  1 proton and 1 electron 
E)  None of these 
A)  2 protons and 1 electron 
B)  1 proton and 2 electrons 
C)  2 protons and 3 electrons 
D)  1 proton and 1 electron 
E)  None of these

Question 19

Caffeine has the empirical formula C4H5N2O and an approximate molecular weight of 194.2 g/mol. What is its molecular formula?

Accepted Answer

A)  C4H5N2O 
B)  C2H2NO 
C)  C8H10N4O2 
D)  C4H4N4O4 
E)  C2H2N2O2 
A)  C4H5N2O 
B)  C2H2NO 
C)  C8H10N4O2 
D)  C4H4N4O4 
E)  C2H2N2O2

Question 20

The chemical compound (CH3)3COH can also be represented as:

Accepted Answer

A)  C3H9O. 
B)  C3H10O. 
C)  C4H9O. 
D)  C4H10O. 
E)  C4H10O2. 
A)  C3H9O. 
B)  C3H10O. 
C)  C4H9O. 
D)  C4H10O. 
E)  C4H10O2.

A sample contains 52.0 g of elemental phosphorus, P₄. Determine the number of moles of P₄ and the number of atoms of phosphorus present in the sample.

Name the alkane with the formula C₃H₈.

A hydrocarbon contains 79.89% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

The formula CH₃CH₂CH₂OH is an example of a(n):

Which compound is incorrectly named?

Determine the percent potassium present in K₂SO₄.

Give the formula for the ionic compound that forms between strontium and fluorine.

Which of the following are constitutional isomers?

Ions that contain atoms of more than two elements are called _____________ ions.

Which of the following is not a binary compound?

An organic compound has an empirical formula of CH₂O and had an approximate molecular weight of 117. What is its molecular formula?

A hydrocarbon contains 85.7% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

An organic compound has an empirical formula of C₂H₃O and had an approximate molecular weight of 86. What is its molecular formula?

A hydrate of magnesium sulfate, MgSO₄·nH₂O, loses 37.4% of its mass upon heating. The mass loss can be considered to be only water. What is the value of n if all of the water was lost?

Which compound is incorrectly named?

Determine the percent carbon in the acetate ion CH₃COO^-.

Name the compound with the formula VCl₃.

Which combination below corresponds to the H⁺ ion?

Caffeine has the empirical formula C₄H₅N₂O and an approximate molecular weight of 194.2 g/mol. What is its molecular formula?

The chemical compound (CH₃)₃COH can also be represented as:

The Nature of Chemistry

Atoms and Elements

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Covalent Bonding

Molecular Structure

Gases and the Atmosphere

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

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Exam 3: Chemical Compounds

A sample contains 52.0 g of elemental phosphorus, P4. Determine the number of moles of P4 and the number of atoms of phosphorus present in the sample.

Name the alkane with the formula C3H8.

A hydrocarbon contains 79.89% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

The formula CH3CH2CH2OH is an example of a(n):

Which compound is incorrectly named?

Determine the percent potassium present in K2SO4.

Give the formula for the ionic compound that forms between strontium and fluorine.

Which of the following are constitutional isomers?

Ions that contain atoms of more than two elements are called _____________ ions.

Which of the following is not a binary compound?

An organic compound has an empirical formula of CH2O and had an approximate molecular weight of 117. What is its molecular formula?

A hydrocarbon contains 85.7% carbon and the remainder hydrogen. Determine the empirical formula of the compound.

An organic compound has an empirical formula of C2H3O and had an approximate molecular weight of 86. What is its molecular formula?

A hydrate of magnesium sulfate, MgSO4·nH2O, loses 37.4% of its mass upon heating. The mass loss can be considered to be only water. What is the value of n if all of the water was lost?

Which compound is incorrectly named?

Determine the percent carbon in the acetate ion CH3COO-.

Name the compound with the formula VCl3.

Which combination below corresponds to the H+ ion?

Caffeine has the empirical formula C4H5N2O and an approximate molecular weight of 194.2 g/mol. What is its molecular formula?

The chemical compound (CH3)3COH can also be represented as:

The Nature of Chemistry

Atoms and Elements

Quantities of Reactants and Products

Chemical Reactions

Energy and Chemical Reactions

Electron Configurations and the Periodic Table

Covalent Bonding

Molecular Structure

Gases and the Atmosphere

Liquids, Solids, and Materials

Chemical Kinetics: Rates of Reactions

Chemical Equilibrium

The Chemistry of Solutes and Solutions

Acids and Bases

Additional Aqueous Equilibria

Thermodynamics: Directionality of Chemical Reactions

Electrochemistry and Its Applications

Nuclear Chemistry

Filters

A sample contains 52.0 g of elemental phosphorus, P₄. Determine the number of moles of P₄ and the number of atoms of phosphorus present in the sample.

Name the alkane with the formula C₃H₈.

The formula CH₃CH₂CH₂OH is an example of a(n):

Determine the percent potassium present in K₂SO₄.

An organic compound has an empirical formula of CH₂O and had an approximate molecular weight of 117. What is its molecular formula?

An organic compound has an empirical formula of C₂H₃O and had an approximate molecular weight of 86. What is its molecular formula?

A hydrate of magnesium sulfate, MgSO₄·nH₂O, loses 37.4% of its mass upon heating. The mass loss can be considered to be only water. What is the value of n if all of the water was lost?

Determine the percent carbon in the acetate ion CH₃COO^-.

Name the compound with the formula VCl₃.

Which combination below corresponds to the H⁺ ion?

Caffeine has the empirical formula C₄H₅N₂O and an approximate molecular weight of 194.2 g/mol. What is its molecular formula?

The chemical compound (CH₃)₃COH can also be represented as: