Deck 7: Chemical Quantities and Reactions

Question 1

What is the molar mass of ,a substance formerly used in medicine as an antacid?

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

Answer 1

262.9 g/mole

Question 2

One mole of helium gas weighs ________.

A)1.000 g
B)2.002 g
C)3.003 g
D)4.003 g
E)8.006 g

Answer 2

4.003 g

Question 3

0.400 mole of sucrose, ,contains ________ moles of C.

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

Answer 3

4.80

Question 4

Calculate the molar mass of potassium chloride,KCl.

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

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

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 6

0.100 mole of lithium has a mass of ________.

A)3.00 g
B)0.300 g
C)6.94 g
D)0.694 g
E)0.700 g

Question 7

Calculate the molar mass of magnesium chloride,MgCl₂

A)24.31 g/mole
B)95.21 g/mole
C)125.9 g/mole
D)59.76 g/mole
E)70.90 g/mole

Question 8

Avogadro's number is the number of ________.

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 × g of an element
E)moles in 6.02 × amu of an element

Question 9

What is the molar mass of sodium phosphate, ?

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 10

What is the molar mass of sucrose ( )?

A)29.02 g/mole
B)50.23 g/mole
C)210.0 g/mole
D)342.3 g/mole
E)182.0 g/mole

Question 11

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

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

Question 12

The molar mass of potassium is ________.

A)19.00 g/mole
B)31.00 g/mole
C)6.02 × g/mole
D)39.10 g/mole
E)15.02 g/mole

Question 13

The molar mass of is ________.

A)76.09 g/mole
B)60.09 g/mole
C)29.02 g/mole
D)69.02 g/mole
E)52.01 g/mole

Question 14

How many moles of water, H₂O,are present in 75.0 g H₂O?

A)4.41 moles
B)4.16 moles
C)75.0 moles
D)7.50 moles
E)1.35 × moles

Question 15

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

A) particles
B)3 × particles
C)3 × particles
D)6.02 × particles
E)6.02 × particles

Question 16

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

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

Question 17

One mole of neon atoms has a mass of ________.

A)6.02 × g
B)14.01 g
C)10.01 g
D)20.18 g
E)22.99 g

Question 18

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

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

Question 19

The molar mass of calcium hydroxide, ,is ________.

A)58.09 g/mole
B)57.09 g/mole
C)74.10 g/mole
D)114.2 g/mole
E)54.02 g/mole

Question 20

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

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

Question 21

How many grams of are there in 0.500 mole of ?

A)79.9 g
B)35.9 g
C)63.8 g
D)51.9 g
E)160.g

Question 22

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

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

Question 23

How many grams of glucose ( )are in 3.55 moles of glucose?

A)180.g
B)640.g
C)103 g
D)426 g
E)50.7 g

Question 24

In this reaction,what is the coefficient for calcium oxide?
CaO + CO₂ → CaCO₃

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

Question 25

For the following reaction,what is the correct coefficient for the ?
Fe + HCl → FeC +

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

Question 26

4.00 moles of sodium have a mass of ________.

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

Question 27

3.00 moles of have a mass of ________.

A)138 g
B)46.0 g
C)30.0 g
D)90.0 g
E)45.0 g

Question 28

What is the coefficient of hydrogen, ,when the following equation is balanced?
Al + → + ?

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

Question 29

In the following reaction,what is the correct coefficient for aluminum chloride?
Al + → Al

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

Question 30

Which of the following correctly gives the correct coefficients for the reaction below?
+ → + O

A)1,1,1,1
B)1,2,1,4
C)2,4,2,8
D)1,4,1,4
E)2,4,2,4

Question 31

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

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

Question 32

A chemical equation is balanced when ________.

A)the total number of molecules is the same in reactants and products
B)the total number of ions is the same in reactants and products
C)the sum of the coefficients of the reactants is equal to the sum of the coefficients of the products
D)the number of atoms of each element is the same in reactants and products
E)the charge on each atom is the same in reactants and products

Question 33

In this reaction,what is the correct coefficient for sodium chloride?
Pb(N + ? NaCl → PbC + ? NaN

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

Question 34

What is the classification for this unbalanced reaction?
Fe + HCl → FeC + H₂

A)combustion
B)combination
C)decomposition
D)single replacement
E)double replacement

Question 35

Which of the following gives the balanced equation for this reaction?
+ Ca → +

A) + +
B) + Ca → + 3
C)2 + Ca → + 6
D)2 + 3Ca → + 6
E) + Ca → +

Question 36

What coefficient is placed in front of O₂ to complete the balancing of the following equation?
+ ? → 5 + 4 H₂O

A)1
B)3
C)5
D)7
E)9

Question 37

In a ________ reaction,two or more elements or compounds form one product.

A)decomposition
B)single replacement
C)combustion
D)double replacement
E)combination

Question 38

How many moles of are in 15.0 g of ?

A)0.172 moles
B)2.61 × 10³ moles
C)0.111 moles
D)0.0861 moles
E)0.119 moles

Question 39

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

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

Question 40

In any balanced chemical equation,the number of each type of atom on both sides of the equation is ________.

A)doubled
B)the same
C)decreased by one
D)increased by one
E)dependent on the temperature

Question 41

The following reaction is an example of a ________ reaction.
+ 7 → 5 + 4 H₂O

A)combination
B)single replacement
C)combustion
D)decomposition
E)double replacement

Question 42

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
When 4 moles of aluminum are allowed to react with an excess of chlorine gas, ,how many moles of aluminum chloride are produced?
2Al + 3 → 2Al

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

Question 43

The following reaction takes place when an electric current is passed through water.It is an example of a ________ reaction.
O 2 +

A)combination
B)single replacement
C)combustion
D)decomposition
E)double replacement

Question 44

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

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

Question 45

In this reaction,what is the substance oxidized?
Zn + 2 HCl → ZnCl₂ + H₂

A)chlorine
B)zinc chloride
C)hydrogen
D)zinc
E)oxygen

Question 46

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
In the reaction of nitrogen gas, ,with hydrogen gas, ,to form ammonia gas,NH₃,how many moles of hydrogen are needed to react with two moles of nitrogen?
+ 3 → 2

A)2 moles
B)4 moles
C)6 moles
D)8 moles
E)5.710 moles

Question 47

Which of the following is an oxidation-reduction reaction?

A)Ca + → Ca + 2NaCl
B)KOH + → O +
C) + → 2NO
D) + NaCl → AgCl +
E) + 6KOH → 2 + 3

Question 48

For the following question(s),consider the following equation.
2Mg + → 2MgO
The number of moles of MgO produced when 0.20 mole of reacts completely is ________.

A)0.10 mole
B)0.20 mole
C)0.40 mole
D)0.60 mole
E)0.80 mole

Question 49

For the following question(s),consider the following equation.
2Mg + → 2MgO
How many grams of magnesium are needed to react with 16 g of ?

A)0.50 g
B)1.0 g
C)12 g
D)24 g
E)48 g

Question 50

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

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

Question 51

What is oxidized and what is reduced in the following reaction?
2Al + 3 → 2

A)Al is oxidized and is reduced.
B)AlBr₃ is reduced and is oxidized.
C)Al is reduced and is oxidized.
D) is reduced and Al is oxidized.
E) is oxidized and Al is reduced.

Question 52

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

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

Question 53

Given the following equation,what is the correct form of the conversion factor needed to convert the number of moles of to the number of moles of produced?
4Fe + 3 → 2

A)
B)
C)
D)
E)

Question 54

For the following question(s),consider the following equation.
2Mg + → 2MgO
How many grams of MgO are produced when 40.0 grams of react completely with Mg?

A)40.3 g
B)50.4 g
C)60.5 g
D)101 g
E)202 g

Question 55

What is the classification for this reaction?
S + O → S

A)decomposition
B)combination
C)replacement
D)double replacement
E)combustion

Question 56

For the following question(s),consider the following equation.
2Mg + → 2MgO
How many grams of hydrogen are needed to produce 1.80 g of water according to this equation?
2 + → 2 O

A)0.101 g
B)0.180 g
C)0.201 g
D)2.01 g
E)4.02 g

Question 57

For the following question(s),consider the following equation.
2Mg + → 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.
AgN + NaCl → AgCl + NaN

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

Question 58

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
What is the correct form of the conversion factor needed to convert the number of moles of O to the number of moles of produced?

A)
B)
C)
D)
E)

Question 59

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

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

Question 60

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

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

Question 61

Answer the question(s)below about the following reaction.
2 → 2 O +
How many grams of hydrogen peroxide are needed to produce 25.0 g of oxygen?

A)106 g
B)26.6 g
C)5.88 g
D)25.0 g
E)53.2 g

Question 62

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 moles of barium sulfate are produced from 0.1 mole of barium chloride?

A)0.01 mole
B)0.1 mole
C)0.2 mole
D)1 mole
E)2 moles

Question 63

Answer the question(s)below about the following reaction.
2 → 2 O +
How many moles of oxygen gas can 5.0 moles of hydrogen peroxide (H₂O₂)produce,if decomposition is complete?

A)5.0 moles
B)2.5 moles
C)1.0 mole
D)2.0 moles
E)10.moles

Question 64

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
How many grams of NO are required to produce 145 g of in the following reaction?
4 + 6NO → 5 + 6 O

A)186 g
B)155 g
C)125 g
D)129 g
E)145 g

Question 65

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
How many grams of are produced when 125 g of reacts as shown in the following balanced equation?
4 + 6NO → 5 + 6 O

A)206 g
B)257 g
C)165 g
D)7.35 g
E)145 g

Question 66

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

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

Question 67

If the reaction shown below is exothermic,the energy level of the reactants is ________.
+ → O

A)lower than that of the products
B)higher than that of the products
C)the same as that of the products
D)possibly lower,possibly higher than that of the products
E)higher than the activation energy of the reaction

Question 68

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?

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

Question 69

The ________ is the energy difference between reactants and products in a chemical reaction.

A)transition energy
B)activation energy
C)product energy
D)overall energy
E)heat of reaction

Question 70

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 sodium chloride can be produced from 50.grams of barium chloride?

A)2.0 g
B)14 g
C)28 g
D)59 g
E)208 g

Question 71

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

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

Question 72

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

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

Question 73

Barium chloride and sodium sulfate react according to the following equation.
BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl
Answer the following question(s)about this reaction.
In this reaction,what is the correct coefficient for hydrogen gas?
? H₂ + ? O₂ → ? H₂O

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

Question 74

Answer the question(s)below about the following reaction.
2 → 2 O +
How many grams of water will 100.grams of hydrogen peroxide produce?

A)36.0 g
B)360.g
C)5.88 g
D)53.0 g
E)106 g

Question 75

The ________ is the minimum energy needed for a chemical reaction to begin.

A)reaction energy
B)activation energy
C)energy of reactants
D)energy of products
E)heat of reaction

Question 76

Answer the question(s)below about the following reaction.
2 → 2 O +
This is an example of a ________ reaction.

A)combustion
B)combination
C)decomposition
D)single replacement
E)double replacement

Question 77

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
Find the mass of that is produced when 25.0 grams of reacts with HCl according to the following equation.
+ 6HCl → 2 + 3 O

A)155 g
B)72.9 g
C)65.3 g
D)32.6 g
E)16.3 g

Question 78

For the following question(s),consider the following balanced equation.
+ 6 O → 3 + 2
When 36.0 g of O react,how many grams of are produced?

A)34.0 g
B)10.0 g
C)5.67 g
D)11.3 g
E)102 g

Question 79

What type of reaction is:
+ 2 → + 2 O + 218 kcal?

A)an endothermic reaction
B)an exothermic reaction
C)a single replacement reaction
D)a combination reaction
E)a decomposition reaction

Question 80

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

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