Question 1

The following reaction is correctly balanced.
2     + 5   → 4C   +   O

Accepted Answer

A) True 
 B)False

Question 2

The following reaction is correctly balanced.
KCl   → KCl +

Accepted Answer

A) True 
 B)False

Question 3

The mass of 1.57 moles of calcium nitrate is 25.8 g.

Accepted Answer

A) True 
 B)False

Question 4

Calculate the molar mass of potassium chloride,KCl.

Accepted Answer

A) 74.55 g/mole 
B) 54.55 g/mole 
C) 6.745 g/mole 
D) 67.45 g/mole 
E) 19.00 g/mole 
A) 74.55 g/mole 
B) 54.55 g/mole 
C) 6.745 g/mole 
D) 67.45 g/mole 
E) 19.00 g/mole

Question 5

How many moles of carbon atoms are there in 0.500 mole of C2H6  ?

Accepted Answer

A) 0.500 mole 
B) 1.00 mole 
C) 3.00 moles 
D) 6.02 × 1023 moles 
E) 4.00 moles 
A) 0.500 mole 
B) 1.00 mole 
C) 3.00 moles 
D) 6.02 × 1023 moles 
E) 4.00 moles

Question 6

What is the molar mass of Mg3(PO4)2  ,a substance formerly used in medicine as an antacid?

Accepted Answer

A) 71.28 g/mole 
B) 118.3 g/mole 
C) 150.3 g/mole 
D) 214.3 g/mole 
E) 262.9 g/mole 
A) 71.28 g/mole 
B) 118.3 g/mole 
C) 150.3 g/mole 
D) 214.3 g/mole 
E) 262.9 g/mole

Question 7

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

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 8

Avogadro's number is the number of ________.

Accepted Answer

A) particles in 1 mole of a substance 
B) amu in 1 mole of a substance 
C) grams in 1 mole of a substance 
D) moles in 6.02 × 1023  g of an element 
E) moles in 6.02 × 1023 amu of an element 
A) particles in 1 mole of a substance 
B) amu in 1 mole of a substance 
C) grams in 1 mole of a substance 
D) moles in 6.02 × 1023  g of an element 
E) moles in 6.02 × 1023 amu of an element

Question 9

What type of reaction is the following?
2KClO3  → 2KCl + 3O2

Accepted Answer

Question 10

What type of reaction is the following?
2C2H2  + 5O2 → 4CO2 + 2H2O

Accepted Answer

Question 11

Acetylene gas, C2H2  ,reacts with oxygen according to the following equation.If 1 mole of acetylene react completely with sufficient oxygen,how many moles of carbon dioxide are produced?
2 C2H2  + 5O2 → 4CO2 + 2H2O

Accepted Answer

Question 12

The molar mass of copper(II)chloride is 134.5 g/mole.

Accepted Answer

A) True 
 B)False

Question 13

For the following question(s),consider the following balanced equation.  MgS1U1B13S1U1B0NS1U1B12S1U1B0+ 6HS1U1B12S1U1B0O → 3Mg(OH)S1U1B12S1U1B0 + 2NHS1U1B13S1U1B0 
-How many grams of   are produced from 125 g of   and excess   ?   + 2   →   + 2   O

Accepted Answer

A) 125 g 
B) 62.5 g 
C) 172 g 
D) 85.9 g 
E) 250.g 
A) 125 g 
B) 62.5 g 
C) 172 g 
D) 85.9 g 
E) 250.g

Question 14

How many grams of K2SO4 are there in 0.123 mole of K2SO4?

Accepted Answer

A) 14.7 g 
B) 16.6 g 
C) 21.4 g 
D) 42.8 g 
E) 76.3 g 
A) 14.7 g 
B) 16.6 g 
C) 21.4 g 
D) 42.8 g 
E) 76.3 g

Question 15

What is the molar mass of sodium phosphate, Na3PO4 ?

Accepted Answer

A) 69.96 g/mole 
B) 118.0 g/mole 
C) 163.9 g/mole 
D) 226.1 g/mole 
E) 354.0 g/mole 
A) 69.96 g/mole 
B) 118.0 g/mole 
C) 163.9 g/mole 
D) 226.1 g/mole 
E) 354.0 g/mole

Question 16

A reaction that releases energy as it occurs is classified as a(n)________.

Accepted Answer

A) endothermic reaction 
B) exothermic reaction 
C) oxidation-reduction reaction 
D) catalyzed reaction 
E) decomposition reaction 
A) endothermic reaction 
B) exothermic reaction 
C) oxidation-reduction reaction 
D) catalyzed reaction 
E) decomposition reaction

Question 17

For the following question(s),consider the following equation.
2Mg + OS1U1B12S1U1B0 → 2MgO
-In the reaction of silver nitrate with sodium chloride,how many grams of silver chloride will be produced from 100.g of silver nitrate when it is mixed with an excess of sodium chloride? The equation for the reaction is below. AgNO3 + NaCl → AgCl + NaNO3

Accepted Answer

A) 107.9 g 
B) 169.9 g 
C) 84.4 g 
D) 0.589 g 
E) 58.9 g 
A) 107.9 g 
B) 169.9 g 
C) 84.4 g 
D) 0.589 g 
E) 58.9 g

Question 18

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 oxygen 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 19

Any reaction that absorbs 150 kcal of energy can be classified as ________.

Accepted Answer

A) endothermic 
B) exothermic 
C) activated 
D) reduction 
E) oxidation 
A) endothermic 
B) exothermic 
C) activated 
D) reduction 
E) oxidation

Question 20

The molar mass of copper(II)nitrate,Cu( NO3 )2 is ________.

Accepted Answer

The following reaction is correctly balanced. 2 + 5 → 4C + O

The following reaction is correctly balanced. KCl → KCl +

The mass of 1.57 moles of calcium nitrate is 25.8 g.

Calculate the molar mass of potassium chloride,KCl.

How many moles of carbon atoms are there in 0.500 mole of C₂H₆ ?

What is the molar mass of Mg₃(PO₄)₂ ,a substance formerly used in medicine as an antacid?

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

Avogadro's number is the number of ________.

What type of reaction is the following? 2KClO₃ → 2KCl + 3O₂

What type of reaction is the following? 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

Acetylene gas, C₂H₂ ,reacts with oxygen according to the following equation.If 1 mole of acetylene react completely with sufficient oxygen,how many moles of carbon dioxide are produced? 2 C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

The molar mass of copper(II)chloride is 134.5 g/mole.

For the following question(s),consider the following balanced equation. Mg₃N₂+ 6H₂O → 3Mg(OH)₂ + 2NH₃ -How many grams of are produced from 125 g of and excess ? + 2 → + 2 O

How many grams of K2SO4 are there in 0.123 mole of K2SO4?

What is the molar mass of sodium phosphate, Na₃PO₄ ?

A reaction that releases energy as it occurs is classified as a(n)________.

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 oxygen in the balanced equation?

Any reaction that absorbs 150 kcal of energy can be classified as ________.

The molar mass of copper(II)nitrate,Cu( NO₃ )² is ________.

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Exam 7: Chemical Quantities and Reactions

The following reaction is correctly balanced. 2 + 5 → 4C + O

The following reaction is correctly balanced. KCl → KCl +

The mass of 1.57 moles of calcium nitrate is 25.8 g.

Calculate the molar mass of potassium chloride,KCl.

How many moles of carbon atoms are there in 0.500 mole of C2H6 ?

What is the molar mass of Mg3(PO4)2 ,a substance formerly used in medicine as an antacid?

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

Avogadro's number is the number of ________.

What type of reaction is the following? 2KClO3 → 2KCl + 3O2

What type of reaction is the following? 2C2H2 + 5O2 → 4CO2 + 2H2O

Acetylene gas, C2H2 ,reacts with oxygen according to the following equation.If 1 mole of acetylene react completely with sufficient oxygen,how many moles of carbon dioxide are produced? 2 C2H2 + 5O2 → 4CO2 + 2H2O

The molar mass of copper(II)chloride is 134.5 g/mole.

For the following question(s),consider the following balanced equation. Mg3N2+ 6H2O → 3Mg(OH)2 + 2NH3 -How many grams of are produced from 125 g of and excess ? + 2 → + 2 O

How many grams of K2SO4 are there in 0.123 mole of K2SO4?

What is the molar mass of sodium phosphate, Na3PO4 ?

A reaction that releases energy as it occurs is classified as a(n)________.

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 oxygen in the balanced equation?

Any reaction that absorbs 150 kcal of energy can be classified as ________.

The molar mass of copper(II)nitrate,Cu( NO3 )2 is ________.

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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How many moles of carbon atoms are there in 0.500 mole of C₂H₆ ?

What is the molar mass of Mg₃(PO₄)₂ ,a substance formerly used in medicine as an antacid?

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

What type of reaction is the following? 2KClO₃ → 2KCl + 3O₂

What type of reaction is the following? 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

Acetylene gas, C₂H₂ ,reacts with oxygen according to the following equation.If 1 mole of acetylene react completely with sufficient oxygen,how many moles of carbon dioxide are produced? 2 C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

For the following question(s),consider the following balanced equation. Mg₃N₂+ 6H₂O → 3Mg(OH)₂ + 2NH₃ -How many grams of are produced from 125 g of and excess ? + 2 → + 2 O

What is the molar mass of sodium phosphate, Na₃PO₄ ?

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 oxygen in the balanced equation?

The molar mass of copper(II)nitrate,Cu( NO₃ )² is ________.