Question 1

Determine the molecular formula for a compound that is 70.79% carbon,8.91% hydrogen,4.59% nitrogen,and 15.72% oxygen.

Accepted Answer

A) C18H27NO3 
B) C18H27NO2 
C) C17H27NO3 
D) C17H26NO3 
A) C18H27NO3 
B) C18H27NO2 
C) C17H27NO3 
D) C17H26NO3 A

Question 2

Which of the following is an atomic element?

Accepted Answer

A) Br 
B) H 
C) N 
D) O 
E) Mg 
A) Br 
B) H 
C) N 
D) O 
E) Mg E

Question 3

Which of the following is a possible molecular formula for a compound with an empirical formula C4H4O?

Accepted Answer

A) C8H8O2 
B) C12H12O2 
C) C2H2O 
D) C8H8O 
A) C8H8O2 
B) C12H12O2 
C) C2H2O 
D) C8H8O A

Question 4

Which of the following is an acid in aqueous solution?

Accepted Answer

A) CaCO3 
B) HClO2 
C) CH3OCH3 
D) NaCl 
E) KNO3 
A) CaCO3 
B) HClO2 
C) CH3OCH3 
D) NaCl 
E) KNO3

Question 5

Identify a carboxylic acid.

Accepted Answer

A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH 
A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH

Question 6

How many moles of C3H8 contain 4.95 × 1024 hydrogen atoms?

Accepted Answer

A) 8.22 moles C3H8 
B) 6.58 moles C3H8 
C) 1.03 moles C3H8 
D) 9.73 moles C3H8 
E) 3.09 moles C3H8 
A) 8.22 moles C3H8 
B) 6.58 moles C3H8 
C) 1.03 moles C3H8 
D) 9.73 moles C3H8 
E) 3.09 moles C3H8

Question 7

What is the chemical formula for calcium hydroxide?

Accepted Answer

A) CaH2 
B) CaOH 
C) CaOH2 
D) Ca(OH)2 
A) CaH2 
B) CaOH 
C) CaOH2 
D) Ca(OH)2

Question 8

The compound ClO  is named

Accepted Answer

A) chlorite. 
B) hypochlorite. 
C) chlorine monoxide. 
D) chlorine (II)oxide. 
A) chlorite. 
B) hypochlorite. 
C) chlorine monoxide. 
D) chlorine (II)oxide.

Question 9

How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g mol-1.

Accepted Answer

A) 1.23 × 1023 C atoms 
B) 2.96 × 1024 C atoms 
C) 2.87 × 1025 C atoms 
D) 1.10 × 1024 C atoms 
E) 3.68 × 1023 C atoms 
A) 1.23 × 1023 C atoms 
B) 2.96 × 1024 C atoms 
C) 2.87 × 1025 C atoms 
D) 1.10 × 1024 C atoms 
E) 3.68 × 1023 C atoms

Question 10

A typical cup of coffee has about 100.mg of caffeine.Calculate the number of caffeine molecules in 100.mg C8H10N4O2.

Accepted Answer

A) 3.22 × 10-21 
B) 3.10 × 1020 
C) 1.17 × 1025 
D) 3.10 × 1022 
E) 3.10 × 1025 
A) 3.22 × 10-21 
B) 3.10 × 1020 
C) 1.17 × 1025 
D) 3.10 × 1022 
E) 3.10 × 1025

Question 11

Identify a hydrocarbon.

Accepted Answer

A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH 
A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH

Question 12

Which of the following is an acid in aqueous solution?

Accepted Answer

A) NH3 
B) NaF 
C) Ca(C2H3O2)2 
D) HI 
E) KCl 
A) NH3 
B) NaF 
C) Ca(C2H3O2)2 
D) HI 
E) KCl

Question 13

Which of the following is a molecular compound?

Accepted Answer

A) NaCN 
B) LiOH 
C) SrI2 
D) ZnS 
E) P4O10 
A) NaCN 
B) LiOH 
C) SrI2 
D) ZnS 
E) P4O10

Question 14

Identify the name for the compound Fe(C2H3O2)2.

Accepted Answer

A) iron(II)hydrogen carbonate 
B) iron(III)carbonate 
C) iron acetate 
D) iron(II)acetate 
E) iron(II)dihydrogen phosphate 
A) iron(II)hydrogen carbonate 
B) iron(III)carbonate 
C) iron acetate 
D) iron(II)acetate 
E) iron(II)dihydrogen phosphate

Question 15

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-1.

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 16

Identify the perchlorate ion.

Accepted Answer

A) $\mathrm { ClO } _ { 2 } ^ { - }$ 
B) $\mathrm { ClO } _ { 3 } ^ { - }$ 
C) $\mathrm { ClO } _ { 4 } ^ { - }$ 
D) $\mathrm { ClO } ^ { - }$ 
E)  $\mathrm { Cl } ^ { - }$ 
A) $\mathrm { ClO } _ { 2 } ^ { - }$ 
B) $\mathrm { ClO } _ { 3 } ^ { - }$ 
C) $\mathrm { ClO } _ { 4 } ^ { - }$ 
D) $\mathrm { ClO } ^ { - }$ 
E)  $\mathrm { Cl } ^ { - }$

Question 17

Which one of the following compounds contains ionic bonds?

Accepted Answer

A) SrO 
B) HBr 
C) PBr3 
D) SiO2 
A) SrO 
B) HBr 
C) PBr3 
D) SiO2

Question 18

Determine the molecular formula of a compound that has a molar mass of 92.0 g mol-1 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 19

When forming ionic compounds,cations and anions form three-dimensional networks known as

Accepted Answer

A) a molecular compound. 
B) a space-filling compound. 
C) a lattice. 
D) an empirical formula. 
A) a molecular compound. 
B) a space-filling compound. 
C) a lattice. 
D) an empirical formula.

Question 20

Determine the name for P4O10.

Accepted Answer

A) phosphorus(IV)oxide 
B) diphosphorus pentoxide 
C) phosphorus oxide 
D) phosphorus(II)oxide 
E) tetraphosphorus decoxide 
A) phosphorus(IV)oxide 
B) diphosphorus pentoxide 
C) phosphorus oxide 
D) phosphorus(II)oxide 
E) tetraphosphorus decoxide

Exam 3: Molecules,compounds,and Nomenclature

Determine the molecular formula for a compound that is 70.79% carbon,8.91% hydrogen,4.59% nitrogen,and 15.72% oxygen.

Which of the following is an atomic element?

Which of the following is a possible molecular formula for a compound with an empirical formula C4H4O?

Which of the following is an acid in aqueous solution?

Identify a carboxylic acid.

How many moles of C3H8 contain 4.95 × 1024 hydrogen atoms?

What is the chemical formula for calcium hydroxide?

The compound ClO is named

How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g mol-1.

A typical cup of coffee has about 100.mg of caffeine.Calculate the number of caffeine molecules in 100.mg C8H10N4O2.

Identify a hydrocarbon.

Which of the following is an acid in aqueous solution?

Which of the following is a molecular compound?

Identify the name for the compound Fe(C2H3O2)2.

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-1.

Identify the perchlorate ion.

Which one of the following compounds contains ionic bonds?

Determine the molecular formula of a compound that has a molar mass of 92.0 g mol-1 and an empirical formula of NO2.

When forming ionic compounds,cations and anions form three-dimensional networks known as

Determine the name for P4O10.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Which of the following is a possible molecular formula for a compound with an empirical formula C₄H₄O?

How many moles of C₃H₈ contain 4.95 × 10²⁴ hydrogen atoms?

How many atoms of carbon are contained in 47.6 g of Al₂(CO₃)₃? The molar mass of Al₂(CO₃)₃is 233.99 g mol^-1.

A typical cup of coffee has about 100.mg of caffeine.Calculate the number of caffeine molecules in 100.mg C₈H₁₀N₄O₂.

Identify the name for the compound Fe(C₂H₃O₂)₂.

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^-1.

Determine the molecular formula of a compound that has a molar mass of 92.0 g mol^-1 and an empirical formula of NO₂.

Determine the name for P₄O₁₀.