Question 1

Give the formula for lithium chromate.

Accepted Answer

A)  LiCrO3 
B)  Li2Cr2O7 
C)  Li2CrO4 
D)  Li2Cr2O5 
E)  LiCr3O7 
A)  LiCrO3 
B)  Li2Cr2O7 
C)  Li2CrO4 
D)  Li2Cr2O5 
E)  LiCr3O7 C

Question 2

How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Accepted Answer

A)  9.83 × 1020 C2H4 molecules 
B)  7.74 × 1026 C2H4 molecules 
C)  2.71 × 1020 C2H4 molecules 
D)  3.69 × 1023 C2H4 molecules 
E)  4.69 × 1023 C2H4 molecules 
A)  9.83 × 1020 C2H4 molecules 
B)  7.74 × 1026 C2H4 molecules 
C)  2.71 × 1020 C2H4 molecules 
D)  3.69 × 1023 C2H4 molecules 
E)  4.69 × 1023 C2H4 molecules A

Question 3

Balance the following equation.
_____ C9H20 + _____ O2 → _____ H2O + _____ CO2

Accepted Answer

C₉H₂₀ + 14 O₂→ 10 H₂O + 9 CO₂

Question 4

How many chloride ions are there in 7.50 mol of aluminum chloride?

Accepted Answer

A)  3.00 chloride ions 
B)  22.5 chloride ions 
C)  4.52 × 1024 chloride ions 
D)  1.35 × 1025 chloride ions 
A)  3.00 chloride ions 
B)  22.5 chloride ions 
C)  4.52 × 1024 chloride ions 
D)  1.35 × 1025 chloride ions

Question 5

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO3).

Accepted Answer

A)  1.20 
B)  14.30 
C)  57.14 
D)  27.36 
E)  19.05 
A)  1.20 
B)  14.30 
C)  57.14 
D)  27.36 
E)  19.05

Question 6

Write the formula for the compound formed between aluminum and sulfur.

Accepted Answer

A)  Al2S3 
B)  Al3S  
C)  AlS3 
D)  Al2S  
E)  (AlS)3 
A)  Al2S3 
B)  Al3S  
C)  AlS3 
D)  Al2S  
E)  (AlS)3

Question 7

Which of the following is an ionic compound?

Accepted Answer

A)  SCl2 
B)  MgCl2 
C)  Cl2O 
D)  CH2O 
E)  PCl5 
A)  SCl2 
B)  MgCl2 
C)  Cl2O 
D)  CH2O 
E)  PCl5

Question 8

Give the formula for barium bisulfate.

Accepted Answer

A)  BaHSO4 
B)  Ba2(HSO3)2 
C)  Ba2HSO4 
D)  Ba(HSO4)2 
A)  BaHSO4 
B)  Ba2(HSO3)2 
C)  Ba2HSO4 
D)  Ba(HSO4)2

Question 9

Calculate the mass percent composition of sulfur in Al2(SO4)3.

Accepted Answer

A)  28.12% 
B)  9.372% 
C)  42.73% 
D)  21.38% 
E)  35.97% 
A)  28.12% 
B)  9.372% 
C)  42.73% 
D)  21.38% 
E)  35.97%

Question 10

The chemical formula for barium nitride is

Accepted Answer

A)  Ba(NO3)3. 
B)  Ba(NO2)2. 
C)  Ba3N2. 
D)  BaN2. 
E)  Mg2N3 
A)  Ba(NO3)3. 
B)  Ba(NO2)2. 
C)  Ba3N2. 
D)  BaN2. 
E)  Mg2N3

Question 11

Calculate the molar mass for Ba(ClO4)2.

Accepted Answer

A)  336.23 g/mol 
B)  236.78 g/mol 
C)  99.45 g/mol 
D)  137.33 g/mol 
E)  188.78 g/mol 
A)  336.23 g/mol 
B)  236.78 g/mol 
C)  99.45 g/mol 
D)  137.33 g/mol 
E)  188.78 g/mol

Question 12

What type of bonding is found in the compound PCl5?

Accepted Answer

A)  covalent bonding 
B)  hydrogen bonding 
C)  ionic bonding 
D)  metallic bonding 
A)  covalent bonding 
B)  hydrogen bonding 
C)  ionic bonding 
D)  metallic bonding

Question 13

Describe a structural formula.

Accepted Answer

In a structural formula,lines

Question 14

Identify rubbing alcohol.

Accepted Answer

A)  CH3CH2CH2OH 
B)  CH3CH2OH 
C)  CH3OH 
D)  (CH3)2CHOH 
E)  HOCH2CH2OH 
A)  CH3CH2CH2OH 
B)  CH3CH2OH 
C)  CH3OH 
D)  (CH3)2CHOH 
E)  HOCH2CH2OH

Question 15

How much calcium is contained in 35.0 g of calcium fluoride?

Accepted Answer

A)  1.99 g 
B)  7.70 g 
C)  15.0 g 
D)  18.0 g 
A)  1.99 g 
B)  7.70 g 
C)  15.0 g 
D)  18.0 g

Question 16

How many Fe(II)ions are there in 15.0 g of FeSO4?

Accepted Answer

A)  1.64 × 10-25 iron(II) ions 
B)  5.94 × 1022 iron(II) ions 
C)  6.10 × 1024 iron(II) ions 
D)  1.37 × 1027 iron(II) ions 
A)  1.64 × 10-25 iron(II) ions 
B)  5.94 × 1022 iron(II) ions 
C)  6.10 × 1024 iron(II) ions 
D)  1.37 × 1027 iron(II) ions

Question 17

How many moles of PF3 contain 3.68 × 1025 fluorine atoms?

Accepted Answer

A)  61.1 moles PF3 
B)  20.4 moles PF3 
C)  16.4 moles PF3 
D)  54.5 moles PF3 
E)  49.1 moles PF3 
A)  61.1 moles PF3 
B)  20.4 moles PF3 
C)  16.4 moles PF3 
D)  54.5 moles PF3 
E)  49.1 moles PF3

Question 18

6.00 moles of sodium perchlorate contains the same number of atoms as

Accepted Answer

A)  6.00 moles of potassium permanganate. 
B)  6.00 moles of sodium phosphate. 
C)  6.00 moles of barium sulfide. 
D)  6.00 moles of sodium hydroxide. 
E)  6.00 moles of lithium nitrite. 
A)  6.00 moles of potassium permanganate. 
B)  6.00 moles of sodium phosphate. 
C)  6.00 moles of barium sulfide. 
D)  6.00 moles of sodium hydroxide. 
E)  6.00 moles of lithium nitrite.

Question 19

What is the mass of 8.00 × 1022 molecules of NH3?

Accepted Answer

A)  0.00780 g 
B)  0.442 g 
C)  2.26 g 
D)  128 g 
A)  0.00780 g 
B)  0.442 g 
C)  2.26 g 
D)  128 g

Question 20

Give the structure for sodium periodate.

Accepted Answer

A)  Na2IO4 
B)  NaIO  
C)  NaIO3 
D)  NaIO4 
A)  Na2IO4 
B)  NaIO  
C)  NaIO3 
D)  NaIO4

Exam 3: Molecules,compounds,and Chemical Equations

Give the formula for lithium chromate.

How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Balance the following equation. _____ C9H20 + _____ O2 → _____ H2O + _____ CO2

How many chloride ions are there in 7.50 mol of aluminum chloride?

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO3).

Write the formula for the compound formed between aluminum and sulfur.

Which of the following is an ionic compound?

Give the formula for barium bisulfate.

Calculate the mass percent composition of sulfur in Al2(SO4)3.

The chemical formula for barium nitride is

Calculate the molar mass for Ba(ClO4)2.

What type of bonding is found in the compound PCl5?

Describe a structural formula.

Identify rubbing alcohol.

How much calcium is contained in 35.0 g of calcium fluoride?

How many Fe(II)ions are there in 15.0 g of FeSO4?

How many moles of PF3 contain 3.68 × 1025 fluorine atoms?

6.00 moles of sodium perchlorate contains the same number of atoms as

What is the mass of 8.00 × 1022 molecules of NH3?

Give the structure for sodium periodate.

Matter, measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

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,

Liquids,solids,and Intermolecular Forces

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

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol.

Balance the following equation. ___ C₉H₂₀ + _ O₂→ _ H₂O + ___ CO₂

Determine the mass percent (to the hundredths place)of H in sodium bicarbonate (NaHCO₃).

Calculate the mass percent composition of sulfur in Al₂(SO₄)₃.

Calculate the molar mass for Ba(ClO₄)₂.

What type of bonding is found in the compound PCl₅?

How many Fe(II)ions are there in 15.0 g of FeSO₄?

How many moles of PF₃ contain 3.68 × 10²⁵ fluorine atoms?

What is the mass of 8.00 × 10²² molecules of NH₃?