Question 1

The mass of oxygen present in 11.7 g of AL₂(CO₃)3 is ________.

Accepted Answer

A)  7.20 g 
B)  14.4 g 
C)  8.10 g 
D)  4.05 g 
A)  7.20 g 
B)  14.4 g 
C)  8.10 g 
D)  4.05 g

Question 2

The theoretical mass of sodium produced from 2.0 moles of NaN3 is ________. NaN3 → Na + N₂

Accepted Answer

A)  11.5 g 
B)  23 g 
C)  34.5 g 
D)  46 g 
A)  11.5 g 
B)  23 g 
C)  34.5 g 
D)  46 g

Question 3

The mass of two moles of potassium dichromate is 294.2 g.

Accepted Answer

A) True 
 B)False

Question 4

Match each compound with its corresponding percent of oxygen.
-C?H?NO?

Accepted Answer

A) 50.0% 
B) 26.1% 
C) 43.8% 
D) 18.6% 
E) 27.6% 
A) 50.0% 
B) 26.1% 
C) 43.8% 
D) 18.6% 
E) 27.6%

Question 5

Match each compound with its corresponding percent of sulfur.
-C??H26N?O?S

Accepted Answer

A) 8.7% 
B) 22.6% 
C) 41.1% 
D) 40.6% 
A) 8.7% 
B) 22.6% 
C) 41.1% 
D) 40.6%

Question 6

Match each compound with its corresponding molecular mass.
-AL?(SO?)3

Accepted Answer

A) 342 
B) 310 
C) 88 
D) 122.5 
A) 342 
B) 310 
C) 88 
D) 122.5

Question 7

The percent of aluminum in bauxite (also known as aluminum oxide) is 52.9%.

Accepted Answer

A) True 
 B)False

Question 8

0.842 g chlorine will combine with ________ g of sulfur to produce SCL₂.

Accepted Answer

A)  0.481 
B)  1.870 
C)  0.305 
D)  0.379 
A)  0.481 
B)  1.870 
C)  0.305 
D)  0.379

Question 9

Which of the following has 14 atoms per formula unit?

Accepted Answer

A)  (NH₄)2SO₃ 
B)  Al(ClO₄)3 
C)  Pb(CrO₄)2 
D)  Mg3(PO₄)2 
A)  (NH₄)2SO₃ 
B)  Al(ClO₄)3 
C)  Pb(CrO₄)2 
D)  Mg3(PO₄)2

Question 10

The theoretical number of moles of sulfur dioxide produced from 4 moles of sulfuric acid is ________. H₂SO₄ + Cu → SO₂ + H₂O + CuSO₄

Accepted Answer

A)  2 
B)  4 
C)  6 
D)  8 
A)  2 
B)  4 
C)  6 
D)  8

Question 11

What is the mass of NO expected if 104 g of ammonia are consumed in a 100% yield? NH₃ + O₂ → NO + H₂O

Accepted Answer

A)  45.7 g 
B)  91.5 g 
C)  183 g 
D)  366 g 
A)  45.7 g 
B)  91.5 g 
C)  183 g 
D)  366 g

Question 12

Which of the following does not share the same empirical formula as the other three?

Accepted Answer

A)  CH₂O 
B)  C₆H₁₂O6 
C)  C₈H16O8 
D)  C12H22O11 
A)  CH₂O 
B)  C₆H₁₂O6 
C)  C₈H16O8 
D)  C12H22O11

Question 13

A 4.000 g sample of a certain cobalt oxide contains 2.937 g of cobalt. The empirical formula is ________.

Accepted Answer

A)  CoO 
B)  CoO₂ 
C)  CO₂O 
D)  CO₃O₄ 
A)  CoO 
B)  CoO₂ 
C)  CO₂O 
D)  CO₃O₄

Question 14

How many moles of aluminum chloride can be obtained from 4.5 moles of aluminum and excess chlorine? Al + CL₂ → AlCL₃

Accepted Answer

A)  1.5 
B)  3.0 
C)  4.5 
D)  6.0 
A)  1.5 
B)  3.0 
C)  4.5 
D)  6.0

Question 15

How many grams of CO₂ can be made from reacting 78.1 g of O₂ and 62.4 g of C₄H₁₀? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

Accepted Answer

A)  66.1 g CO₂ 
B)  141 g CO₂ 
C)  189 g CO₂ 
D)  378 g CO₂ 
E)  430 g CO₂ 
A)  66.1 g CO₂ 
B)  141 g CO₂ 
C)  189 g CO₂ 
D)  378 g CO₂ 
E)  430 g CO₂

Question 16

The number of molecules of a certain mass of any compound is always higher than the number of moles of the same compound.

Accepted Answer

A) True 
 B)False

Question 17

Combustion of 5.00 mg of a compound produces 15.2 mg of carbon dioxide and 7.80 mg of water. The empirical formula is ________.

Accepted Answer

A)  CH₂ 
B)  C₂H₅ 
C)  C₃H₇ 
D)  C₄H₁₀ 
A)  CH₂ 
B)  C₂H₅ 
C)  C₃H₇ 
D)  C₄H₁₀

Question 18

Match each compound with its corresponding number of atoms per formula unit.
-K?Fe(CNO)6

Accepted Answer

A) 19 
B) 23 
C) 22 
D) 13 
E) 17 
A) 19 
B) 23 
C) 22 
D) 13 
E) 17

Question 19

Which contains the lowest percentage of hydrogen?

Accepted Answer

A)  HCl 
B)  H₂SO₄ 
C)  H₃PO₄ 
D)  H₂O 
A)  HCl 
B)  H₂SO₄ 
C)  H₃PO₄ 
D)  H₂O

Question 20

0.02 moles of a certain aluminum compound has a mass of 1.56 g. This compound may be ________.

Accepted Answer

A)  aluminum hydroxide 
B)  aluminum nitrate 
C)  aluminum cyanide 
D)  aluminum permanganate 
A)  aluminum hydroxide 
B)  aluminum nitrate 
C)  aluminum cyanide 
D)  aluminum permanganate

The mass of oxygen present in 11.7 g of AL₂(CO₃)₃ is ________.

The theoretical mass of sodium produced from 2.0 moles of NaN₃ is ________. NaN₃ → Na + N₂

The mass of two moles of potassium dichromate is 294.2 g.

Match each compound with its corresponding percent of oxygen. -C?H?NO?

Match each compound with its corresponding percent of sulfur. -C??H₂₆N?O?S

Match each compound with its corresponding molecular mass. -AL?(SO?)₃

The percent of aluminum in bauxite (also known as aluminum oxide) is 52.9%.

0.842 g chlorine will combine with ________ g of sulfur to produce SCL₂.

Which of the following has 14 atoms per formula unit?

The theoretical number of moles of sulfur dioxide produced from 4 moles of sulfuric acid is ________. H₂SO₄ + Cu → SO₂ + H₂O + CuSO₄

What is the mass of NO expected if 104 g of ammonia are consumed in a 100% yield? NH₃ + O₂ → NO + H₂O

Which of the following does not share the same empirical formula as the other three?

A 4.000 g sample of a certain cobalt oxide contains 2.937 g of cobalt. The empirical formula is ________.

How many moles of aluminum chloride can be obtained from 4.5 moles of aluminum and excess chlorine? Al + CL₂ → AlCL₃

How many grams of CO₂ can be made from reacting 78.1 g of O₂ and 62.4 g of C₄H₁₀? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

The number of molecules of a certain mass of any compound is always higher than the number of moles of the same compound.

Combustion of 5.00 mg of a compound produces 15.2 mg of carbon dioxide and 7.80 mg of water. The empirical formula is ________.

Match each compound with its corresponding number of atoms per formula unit. -K?Fe(CNO)₆

Which contains the lowest percentage of hydrogen?

0.02 moles of a certain aluminum compound has a mass of 1.56 g. This compound may be ________.

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Exam 9: Stoichiometry and the Mole

The mass of oxygen present in 11.7 g of AL₂(CO₃)3 is ________.

The theoretical mass of sodium produced from 2.0 moles of NaN3 is ________. NaN3 → Na + N₂

The mass of two moles of potassium dichromate is 294.2 g.

Match each compound with its corresponding percent of oxygen. -C?H?NO?

Match each compound with its corresponding percent of sulfur. -C??H26N?O?S

Match each compound with its corresponding molecular mass. -AL?(SO?)3

The percent of aluminum in bauxite (also known as aluminum oxide) is 52.9%.

0.842 g chlorine will combine with ________ g of sulfur to produce SCL₂.

Which of the following has 14 atoms per formula unit?

The theoretical number of moles of sulfur dioxide produced from 4 moles of sulfuric acid is ________. H₂SO₄ + Cu → SO₂ + H₂O + CuSO₄

What is the mass of NO expected if 104 g of ammonia are consumed in a 100% yield? NH₃ + O₂ → NO + H₂O

Which of the following does not share the same empirical formula as the other three?

A 4.000 g sample of a certain cobalt oxide contains 2.937 g of cobalt. The empirical formula is ________.

How many moles of aluminum chloride can be obtained from 4.5 moles of aluminum and excess chlorine? Al + CL₂ → AlCL₃

How many grams of CO₂ can be made from reacting 78.1 g of O₂ and 62.4 g of C₄H₁₀? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

The number of molecules of a certain mass of any compound is always higher than the number of moles of the same compound.

Combustion of 5.00 mg of a compound produces 15.2 mg of carbon dioxide and 7.80 mg of water. The empirical formula is ________.

Match each compound with its corresponding number of atoms per formula unit. -K?Fe(CNO)6

Which contains the lowest percentage of hydrogen?

0.02 moles of a certain aluminum compound has a mass of 1.56 g. This compound may be ________.

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

The mass of oxygen present in 11.7 g of AL₂(CO₃)₃ is ________.

The theoretical mass of sodium produced from 2.0 moles of NaN₃ is ________. NaN₃ → Na + N₂

Match each compound with its corresponding percent of sulfur. -C??H₂₆N?O?S

Match each compound with its corresponding molecular mass. -AL?(SO?)₃

Match each compound with its corresponding number of atoms per formula unit. -K?Fe(CNO)₆