Question 1

In an oxidation-reduction reaction,the substance reduced always ________.

Accepted Answer

A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species 
A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species

Question 2

Which of the following is an oxidation-reduction reaction?

Accepted Answer

A) CaCl2 + Na2SO4 → CaSO4 + 2NaCl 
B) KOH + HNO3 →  H2O + KNO3 
C)  N2 + O2 → 2NO 
D)  AgNO3 + NaCl → AgCl + NaNO3 
E)  Al2(SO4)3 + 6KOH → 2Al(OH)3 + 3K2SO4 
A) CaCl2 + Na2SO4 → CaSO4 + 2NaCl 
B) KOH + HNO3 →  H2O + KNO3 
C)  N2 + O2 → 2NO 
D)  AgNO3 + NaCl → AgCl + NaNO3 
E)  Al2(SO4)3 + 6KOH → 2Al(OH)3 + 3K2SO4

Question 3

One mole of copper(II)sulfate,CuSO4 ,contains ________ moles of O.

Accepted Answer

A) 4 
B) 6.02 × 1023 
C) 1.51 × 1023 
D) 2.41 × 1023 
E) 2.41 × 1024 
A) 4 
B) 6.02 × 1023 
C) 1.51 × 1023 
D) 2.41 × 1023 
E) 2.41 × 1024

Question 4

The molar mass of chlorine gas is 35.45 g/mole.

Accepted Answer

A) True 
 B)False

Question 5

Pentane (  CS1U1B15S1U1B0HS1U1B112S1U1B0 )reacts with oxygen ( OS1U1B12S1U1B0 )to form carbon dioxide ( COS1U1B12S1U1B0 )and water ( HS1U1B12S1U1B0O)according to the following reaction.Answer the following question(s)about this reaction. CS1U1B15S1U1B0HS1U1B112S1U1B0 + ?OS1U1B12S1U1B0  → ?COS1U1B12S1U1B0 + ?HS1U1B12S1U1B0O
-What is the coefficient for water in the balanced equation?

Accepted Answer

A) 2 
B) 4 
C) 5 
D) 6 
E) 8 
A) 2 
B) 4 
C) 5 
D) 6 
E) 8

Question 6

Pentane (  CS1U1B15S1U1B0HS1U1B112S1U1B0 )reacts with oxygen ( OS1U1B12S1U1B0 )to form carbon dioxide ( COS1U1B12S1U1B0 )and water ( HS1U1B12S1U1B0O)according to the following reaction.Answer the following question(s)about this reaction. CS1U1B15S1U1B0HS1U1B112S1U1B0 + ?OS1U1B12S1U1B0  → ?COS1U1B12S1U1B0 + ?HS1U1B12S1U1B0O
-In this reaction,what is the coefficient for calcium oxide? CaO + CO2 → CaCO3

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 7

For the following question(s),consider the following equation.
2Mg + OS1U1B12S1U1B0 → 2MgO
-The number of moles of oxygen gas needed to react with 4.0 moles of Mg is ________.

Accepted Answer

A) 1.0 mole 
B) 2.0 moles 
C) 3.0 moles 
D) 4.0 moles 
E) 6.0 moles 
A) 1.0 mole 
B) 2.0 moles 
C) 3.0 moles 
D) 4.0 moles 
E) 6.0 moles

Question 8

0.400 mole of sucrose, C12H22O11
 ,contains ________ C atoms.

Accepted Answer

A) 12 
B) 6.02 × 1023 
C) 5.02 × 1022 
D) 2.89 × 1024 
E) 4.80 
A) 12 
B) 6.02 × 1023 
C) 5.02 × 1022 
D) 2.89 × 1024 
E) 4.80

Question 9

For the following question(s),consider the following balanced equation.  MgS1U1B13S1U1B0NS1U1B12S1U1B0+ 6HS1U1B12S1U1B0O → 3Mg(OH)S1U1B12S1U1B0 + 2NHS1U1B13S1U1B0 
-How many grams of H2O are needed to produce 150 g of Mg(OH)2 ?

Accepted Answer

A) 46 g 
B) 18 g 
C) 130 g 
D) 93 g 
E) 23 g 
A) 46 g 
B) 18 g 
C) 130 g 
D) 93 g 
E) 23 g

Question 10

In the following reaction Al is oxidized.
2Al + 3   → 2

Accepted Answer

A) True 
 B)False

Question 11

What is the molar mass of copper(II)sulfate,CuSO4 ?

Accepted Answer

A) 16.00 g/mole 
B) 63.60 g/mole 
C) 111.6 g/mole 
D) 159.6 g/mole 
E) 319.2 g/mole 
A) 16.00 g/mole 
B) 63.60 g/mole 
C) 111.6 g/mole 
D) 159.6 g/mole 
E) 319.2 g/mole

Question 12

One mole of particles of any substance contains how many particles?

Accepted Answer

A)  106  particles 
B) 3 × 10-10 particles 
C) 3 × 1010 particles 
D) 6.02 × 1023 particles 
E) 6.02 × 10 - 23 particles 
A)  106  particles 
B) 3 × 10-10 particles 
C) 3 × 1010 particles 
D) 6.02 × 1023 particles 
E) 6.02 × 10 - 23 particles

Question 13

The reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction? 2C + O2 → 2CO

Accepted Answer

A) single replacement 
B) double replacement 
C) combination 
D) catalytic 
E) endothermic 
A) single replacement 
B) double replacement 
C) combination 
D) catalytic 
E) endothermic

Question 14

The moles of NH3 in 55.5 g of NH3 is ________.

Accepted Answer

The answer of The moles of NH3 in 55.5 g...

Question 15

In an oxidation-reduction reaction,the substance oxidized always ________.

Accepted Answer

A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species 
A) takes on oxygen atoms 
B) loses electrons 
C) gives up hydrogen atoms 
D) gains electrons 
E) becomes a charged species

Question 16

Avogadro's number is the number of grams in a mole.

Accepted Answer

A) True 
 B)False

Question 17

4.00 moles of sodium have a mass of ________.

Accepted Answer

A) 4.60 g 
B) 11.0 g 
C) 23.0 g 
D) 44.0 g 
E) 92.0 g 
A) 4.60 g 
B) 11.0 g 
C) 23.0 g 
D) 44.0 g 
E) 92.0 g

Question 18

The following reaction is endothermic.
2     + 5   → 4C   +   O + 310 kcal

Accepted Answer

A) True 
 B)False

Question 19

Barium chloride and sodium sulfate react according to the following equation.
BaCl2 + Na2SO4 → BaSO4 + 2NaCl 
Answer the following question(s)about this reaction.
-How many grams of barium chloride are needed to make 100.grams of barium sulfate?

Accepted Answer

A) 44.9 g 
B) 89.2 g 
C) 208 g 
D) 233 g 
E) 46.6 g 
A) 44.9 g 
B) 89.2 g 
C) 208 g 
D) 233 g 
E) 46.6 g

Question 20

For the following question(s),consider the following balanced equation. MgS1U1B13S1U1B0NS1U1B12S1U1B0 + 6HS1U1B12S1U1B0O → 3Mg(OH)S1U1B12S1U1B0 + 2NHS1U1B13S1U1B0 
-When 2 moles of Mg3N2 are allowed to react,how many moles of H2O also react?

Accepted Answer

A) 1 mole 
B) 4 moles 
C) 6 moles 
D) 8 moles 
E) 12 moles 
A) 1 mole 
B) 4 moles 
C) 6 moles 
D) 8 moles 
E) 12 moles

In an oxidation-reduction reaction,the substance reduced always ________.

Which of the following is an oxidation-reduction reaction?

One mole of copper(II)sulfate,CuSO₄ ,contains ________ moles of O.

The molar mass of chlorine gas is 35.45 g/mole.

Pentane ( C₅H₁₂ )reacts with oxygen ( O₂ )to form carbon dioxide ( CO₂ )and water ( H₂O)according to the following reaction.Answer the following question(s)about this reaction. C₅H₁₂ + ?O₂ → ?CO₂ + ?H₂O -What is the coefficient for water in the balanced equation?

For the following question(s),consider the following equation. 2Mg + O₂ → 2MgO -The number of moles of oxygen gas needed to react with 4.0 moles of Mg is ________.

0.400 mole of sucrose, C₁₂H₂₂O₁₁ ,contains ________ C atoms.

For the following question(s),consider the following balanced equation. Mg₃N₂+ 6H₂O → 3Mg(OH)₂ + 2NH₃ -How many grams of H₂O are needed to produce 150 g of Mg(OH)₂ ?

In the following reaction Al is oxidized. 2Al + 3 → 2

What is the molar mass of copper(II)sulfate,CuSO₄ ?

One mole of particles of any substance contains how many particles?

The reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction? 2C + O₂ → 2CO

The moles of NH3 in 55.5 g of NH3 is ________.

In an oxidation-reduction reaction,the substance oxidized always ________.

Avogadro's number is the number of grams in a mole.

4.00 moles of sodium have a mass of ________.

The following reaction is endothermic. 2 + 5 → 4C + O + 310 kcal

Barium chloride and sodium sulfate react according to the following equation. BaCl2 + Na2SO4 → BaSO4 + 2NaCl Answer the following question(s)about this reaction. -How many grams of barium chloride are needed to make 100.grams of barium sulfate?

For the following question(s),consider the following balanced equation. Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + 2NH₃ -When 2 moles of Mg₃N₂ are allowed to react,how many moles of H₂O also react?

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Exam 7: Chemical Quantities and Reactions

In an oxidation-reduction reaction,the substance reduced always ________.

Which of the following is an oxidation-reduction reaction?

One mole of copper(II)sulfate,CuSO4 ,contains ________ moles of O.

The molar mass of chlorine gas is 35.45 g/mole.

Pentane ( C5H12 )reacts with oxygen ( O2 )to form carbon dioxide ( CO2 )and water ( H2O)according to the following reaction.Answer the following question(s)about this reaction. C5H12 + ?O2 → ?CO2 + ?H2O -What is the coefficient for water in the balanced equation?

Pentane ( C5H12 )reacts with oxygen ( O2 )to form carbon dioxide ( CO2 )and water ( H2O)according to the following reaction.Answer the following question(s)about this reaction. C5H12 + ?O2 → ?CO2 + ?H2O -In this reaction,what is the coefficient for calcium oxide? CaO + CO2 → CaCO3

For the following question(s),consider the following equation. 2Mg + O2 → 2MgO -The number of moles of oxygen gas needed to react with 4.0 moles of Mg is ________.

0.400 mole of sucrose, C12H22O11 ,contains ________ C atoms.

For the following question(s),consider the following balanced equation. Mg3N2+ 6H2O → 3Mg(OH)2 + 2NH3 -How many grams of H2O are needed to produce 150 g of Mg(OH)2 ?

In the following reaction Al is oxidized. 2Al + 3 → 2

What is the molar mass of copper(II)sulfate,CuSO4 ?

One mole of particles of any substance contains how many particles?

The reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction? 2C + O2 → 2CO

The moles of NH3 in 55.5 g of NH3 is ________.

In an oxidation-reduction reaction,the substance oxidized always ________.

Avogadro's number is the number of grams in a mole.

4.00 moles of sodium have a mass of ________.

The following reaction is endothermic. 2 + 5 → 4C + O + 310 kcal

Barium chloride and sodium sulfate react according to the following equation. BaCl2 + Na2SO4 → BaSO4 + 2NaCl Answer the following question(s)about this reaction. -How many grams of barium chloride are needed to make 100.grams of barium sulfate?

For the following question(s),consider the following balanced equation. Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3 -When 2 moles of Mg3N2 are allowed to react,how many moles of H2O also react?

Chemistry in Our Lives

Chemistry and Measurement

Matter and Energy

Atoms and Elements

Nuclear Chemistry

Ionic and Molecular Compounds

Gases

Solutions

Acids and Bases and Equilibrium

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, thiols, ethers, aldehydes, and Ketones

Carbohydrates

Carboxylic Acids, esters, amines, and Amides

Lipids

Amino Acids, proteins, and Enzymes

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One mole of copper(II)sulfate,CuSO₄ ,contains ________ moles of O.

Pentane ( C₅H₁₂ )reacts with oxygen ( O₂ )to form carbon dioxide ( CO₂ )and water ( H₂O)according to the following reaction.Answer the following question(s)about this reaction. C₅H₁₂ + ?O₂ → ?CO₂ + ?H₂O -What is the coefficient for water in the balanced equation?

For the following question(s),consider the following equation. 2Mg + O₂ → 2MgO -The number of moles of oxygen gas needed to react with 4.0 moles of Mg is ________.

0.400 mole of sucrose, C₁₂H₂₂O₁₁ ,contains ________ C atoms.

For the following question(s),consider the following balanced equation. Mg₃N₂+ 6H₂O → 3Mg(OH)₂ + 2NH₃ -How many grams of H₂O are needed to produce 150 g of Mg(OH)₂ ?

What is the molar mass of copper(II)sulfate,CuSO₄ ?

The reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction? 2C + O₂ → 2CO

For the following question(s),consider the following balanced equation. Mg₃N₂ + 6H₂O → 3Mg(OH)₂ + 2NH₃ -When 2 moles of Mg₃N₂ are allowed to react,how many moles of H₂O also react?