Deck 9: Calculations From Chemical Equations

Question 1

How many grams of molecular chlorine will be required to completely react with 0.0223 moles of sodium iodide according to the following reaction? 2NaI + Cl₂ 2NaCl + I₂

A)1.57 10^-4 grams
B)3.16 grams
C)0.0112 grams
D)0.791 grams

Answer 1

0.791 grams

Question 2

How many moles of benzene (C₆H₆)should be completely combusted in order to produce 0.4000 moles of carbon dioxide? 2C₆H₆ + 15O₂ 12CO₂ + 6 H₂O

A)4.800 moles
B)0.2000 moles
C)2.400 moles
D)0.06667 moles

Answer 2

0.06667 moles

Question 3

How many grams of sodium iodide are required to react completely with 3.01 10²³ molecules of chlorine? 2NaI + Cl₂ I₂ + 2NaCl

A)1.50 g
B)37.5 g
C)150.g
D)74.9 g

Answer 3

150.g

Question 4

What mass of sodium chloride will be required to completely react with 4.00 10²⁴ units of AgNO₃ and form AgCl and sodium nitrate?

A)6.64 g
B)0.114 g
C)388 g
D)8.80 g

Question 5

How many grams of water will be required to completely react with 1.00 mole of CaO according to the following reaction? CaO + H₂O Ca(OH)₂

A)5.55 grams
B)0.0555 grams
C)18.02 grams
D)1.00 gram

Question 6

What mass of sodium hydroxide will neutralize completely 3.612 moles of HCl?

A)3.612 grams
B)144.5 grams
C)11.07 grams
D)0.09030 grams

Question 7

How many grams of O₂ are required to produce 1.23 10²⁴ molecules of water? 2H₂ + O₂ 2H₂O

A)32.7 g
B)131 g
C)65.4 g
D)16.3 g

Question 8

How many molecules of O₂ will be required to produce 1.60 moles of water? 2H₂ + O₂ 2H₂O

A)4.82 10²³
B)9.64 10²³
C)1.93 10²⁴
D)0.800

Question 9

Calculate the number of moles of excess reactant that will be left-over when 50.0 g of KI react with 50.0 g of Br₂: 2KI + Br₂ 2KBr + I₂

A)both reactants are consumed completely
B)0.145 moles
C)0.0117 moles
D)0.162 moles

Question 10

Calculate the number of moles of excess reactant that will be left-over when 56.0 g of CaCl₂ react with 64.0 g of Na₂SO₄: CaCl₂ + Na₂SO₄ CaSO₄ + 2NaCl

A)0.0540 moles
B)0.0798 moles
C)0.291 moles
D)both reactants are consumed completely

Question 11

How many units of sodium iodide will be required to react completely with 3.01 moles of molecular bromine? 2NaI + Br₂ 2NaBr + I₂

A)3.63 10²⁴
B)1.81 10²⁴
C)9.06 10²³
D)6.02

Question 12

How many moles of NH₃ will be produced by the complete reaction of 1.60 moles of H₂ in the following equation? N₂ + 3H₂ $\rarr$ 2NH₃

A)1.07
B)1.60
C)2.40
D)3.20

Question 13

How many moles of HF will be produced by the complete reaction of 1.42 moles of H₂ in the following equation? H₂ + F₂ $\rarr$ 2HF

A)0.710
B)1.42
C)2.00
D)2.84

Question 14

How many moles of iron(III)oxide are required to completely react with 1.40 10²² atoms of carbon? Fe₂O₃ + 3C 2Fe + 3CO

A)0.0232 moles
B)0.00775 moles
C)0.0697 moles
D)4.67 10²¹ moles

Question 15

How many molecules of O₂ will be required to react completely with 0.600 moles of H₂ in order to form water?

A)0.300
B)7.23 10²³
C)1.81 10²³
D)3.61 10²³

Question 16

How many moles of molecular oxygen will be needed for the complete combustion of 100.0 g of sulfur dioxide? The product of this reaction is sulfur trioxide.

A)0.7804 moles
B)1.561 moles
C)0.641 moles
D)1.281 moles

Question 17

Calculate the number of moles of excess reactant that will be left-over when 0.350 g of HCN react with 0.500 g of O₂: 4HCN + 5O₂ 2N₂ + 4CO₂ + 2H₂O

A)0.150 moles
B)3.24 10

³ moles
C)4.50 10

⁴ moles
D)5.62 10

⁴ moles

Question 18

Based on the following chemical equation 4HCN + 5O₂ 2N₂ + 4CO₂ + 2H₂O
Identify the limiting reactant and the mass of N₂ produced when 100.0 g of HCN react with 100.0 g of O₂.

A)the limiting reactant is HCN and 25.9 g of N₂ are produced
B)the limiting reactant is O₂ and 35.0 g of N₂ are produced
C)the limiting reactant is HCN and 51.8 g of N₂ are produced
D)both reactants are consumed completely

Question 19

Based on the following chemical equation 2C₆H₆ + 15O₂ 12CO₂ + 6H₂O
Calculate the number of moles of CO₂ that will be produced when 8.90 moles of H₂O are produced as well?

A)1.07 10²⁵ moles
B)4.45 moles
C)17.8 moles
D)2.68 10²⁴ moles

Question 20

What mass of sodium hydroxide will be required to neutralize completely 1.60 10²³ molecules of HCl?

A)10.6 g
B)16.5 g
C)38.5 g
D)64.0 g

Question 21

How many moles of H₂O are produced when 1.12 * 10²³ molecule of H₃PO₄ are consumedin the following equation? 3Ca(OH)₂ + 2H₃PO₄ $\rarr$ Ca₃(PO₄)₂ + 6H₂O

A)0.0620
B)0.558
C)0.667
D)3.00

Question 22

How many units of K₂SO₄ are produced when 0.250 moles of K react completely in the following equation? 2K + MgSO₄ $\rarr$ K₂SO₄ + Mg

A)7.53 * 10²²
B)3.01 * 10²³
C)6.02 * 10²³
D)1.51 * 10²³

Question 23

How many molecules of NH₃ are produced when 3.00 moles of H₂ react completely in thefollowing equation? N₂ + 3H₂ $\rarr$ 2NH₃

A)0.667
B)1.50
C)1.20 10²⁴
D)2.71 10²⁴

Question 24

How many moles of Zn are consumed when 1.60 * 10²⁴ molecules of HCl react completelyin the following equation? Zn + 2HCl $\rarr$ ZnCl₂ + H₂

A)1.33
B)2.66
C)3.99
D)5.32

Question 25

How many molecules of O₂ are produced when 0.500 moles of P₄O₁₀ react completely in the following equation? P₄O₁₀ $\rarr$ 4P + 5O₂

A)1.21 * 10²⁴
B)1.51 *10²⁴
C)6.02 * 10²⁴
D)3.01 * 10²⁴

Question 26

How many moles of C₃H₈ are consumed when 1.81 * 10²³ molecules of CO₂ are produced in the following equation? C₃H₈ + 5O₂ $\rarr$ 3CO₂ + 4H₂O

A)0.100
B)0.897
C)6.03 * 10²²
D)5.43 * 10²³

Question 27

How many moles of C₃H₆ will be consumed when 4.11 moles of CO₂ are produced in the following equation? 2C₃H₆ + 9O₂ $\rarr$ 6CO₂ + 6H₂O

A)1.37
B)4.11
C)6.00
D)12.3

Question 28

How many molecules of chlorine are needed to completely react with 2.00 moles of carbon according to the following equation? C + 2Cl₂ $\rarr$ CCl₄

A)3.01 * 10²³
B)6.02 * 10²³
C)1.20 * 10²⁴
D)2.41 *10²⁴

Question 29

How many moles of carbon dioxide are produced when 3.00 moles of oxygen react completely in the following equation? C₃H₈ + 5O₂ $\rarr$ 3CO₂ + 9H₂O

A)1.80
B)3.00
C)5.00
D)9.00

Question 30

How many moles of H₂O are produced when 1.60 * 10²² molecules of O₂ react completely in the following equation? 2C₂H₂ + 5O₂ $\rarr$ 4CO₂ + 2H₂O

A)0.0106
B)0.0664
C)2.41 * 10²³
D)1.51 * 10²⁴

Question 31

How many moles of carbon dioxide are produced when 9.03 * 10²³ molecules of oxygen react completely in the following equation? C₃H₈ + 5O₂ $\rarr$ 3CO₂ + 4H₂O

A)0.600
B)1.67
C)0.900
D)2.50

Question 32

How many moles of N₂ will be consumed when 1.60 moles of H₂ react completely in the following equation? N₂ + 3H₂ $\rarr$ 2NH₃

A)0.533
B)1.60
C)3.20
D)4.80

Question 33

How many molecules of O₂ are consumed when 1.00 mole of N₂O₅ is produced in the following equation? 2N₂ + 5O₂ $\rarr$ 2N₂O₅

A)3.01 * 10²⁴
B)1.20 * 10²⁴
C)2.41 *10²³
D)1.51 * 10²⁴

Question 34

How many moles of CO₂ are produced when 3.01 10²³ molecules of C₃H₆ react completely in the following equation? 2C₃H₆ + 9O₂ $\rarr$ 6CO₂ + 6H₂O

A)0.167
B)1.50
C)1.51 * 10²³
D)2.01 * 10²³

Question 35

How many moles of Al will be consumed when 0.400 moles of Al₂O₃ are produced in thefollowing equation? 4Al + 3O₂ $\rarr$ 2Al₂O₃

A)0.200
B)0.400
C)0.600
D)0.800

Question 36

How many molecules of water are produced when 3.00 moles of copper react completely in the following equation? Cu + 2H₂SO₄ $\rarr$ CuSO₄ + 2H₂O + SO₂

A)9.03 * 10²³
B)3.61 * 10²⁴
C)1.20 * 10²⁴
D)2.71 * 10²⁴

Question 37

How many moles of NH₃ are consumed when 1.60 * 10²² molecules of O₂ react completely in the following equation? NH₃ + 2O₂ $\rarr$ HNO₃ + H₂O

A)0.0133
B)0.608
C)1.22
D)1.83 * 10²³

Question 38

What mass of HCl is produced when 3.00 moles of H₂ react completely in the following equation? H₂ + Cl₂ $\rarr$ 2HCl

A)54.7g
B)72.9g
C)109g
D)219g

Question 39

How many moles of Cl₂ are consumed when 0.500 moles of AlCl₃ are produced in the following equation? 2Al + 3Cl₂ $\rarr$ 2AlCl₃

A)0.333
B)0.500
C)0.750
D)1.00

Question 40

How many molecules of sulfur trioxide are produced when 1.62 moles of oxygen react completely in the following equation? S₈ + 12O₂ $\rarr$ 8SO₃

A)1.08
B)2.43
C)6.50 * 10²³
D)1.46 * 10²⁴

Question 41

How many moles of CO₂ are produced when 45.0g of C₆H₆ react completely in the following equation? 2C₆H₆ + 15O₂ $\rarr$ 12CO₂ + 6H₂O

A)0.0960
B)0.289
C)3.46
D)10.4

Question 42

How many moles of N₂O₅ are produced when 3.00g of O₂ react completely in the following equation? 2N₂ + 5O₂ $\rarr$ 2N₂O₅

A)0.0375
B)0.0750
C)0.234
D)0.469

Question 43

What mass of oxygen is consumed when 54.0g of water is produced in the following equation? 2H₂ + O₂ $\rarr$ 2H₂O

A)0.167g
B)0.667g
C)1.50g
D)47.9g

Question 44

What mass of hydrogen is produced when 0.400 moles of water react completely in the following equation? 2Na + 2H₂O $\rarr$ 2NaOH + H₂

A)0.323g
B)1.62g
C)0.404g
D)2.02g

Question 45

How many moles of Al(OH)₃ are produced when 50.0 g of KOH react completely in the following equation? AlCl₃ + 3KOH $\rarr$ Al(OH)₃ + 3KCl

A)0.297
B)0.374
C)2.67
D)3.37

Question 46

How many moles of carbon dioxide are produced when 12.0g of oxygen react completely in the following equation? C₃H₈ + 5O₂ $\rarr$ 3CO₂ + 4H₂O

A)0.225
B)0.450
C)0.625
D)1.25

Question 47

What mass of hydrogen is produced when 4.00 moles of zinc react completely in the following equation? Zn + 2HCl $\rarr$ ZnCl₂ + H₂

A)0.505g
B)2.02g
C)6.06g
D)8.08g

Question 48

What mass of oxygen is consumed when 100.g of nitrogen react completely in the following equation? N₂ + O₂ $\rarr$ 2NO

A)0.112g
B)64.0g
C)100.g
D)114g

Question 49

How many moles of CO₂ are consumed when 22.0g of NH₃ react completely in the following equation? CO₂ + 2NH₃ $\rarr$ CO(NH₂)₂ + H₂O

A)0.387
B)0.646
C)1.55
D)2.58

Question 50

How many moles of oxygen are consumed when 38.0g of aluminum oxide are produced in the following equation? 4Al + 3O₂ $\rarr$ 2Al₂O₃

A)0.248
B)0.559
C)1.50
D)3.00

Question 51

How many moles of K₂S are consumed when 14.0 g of KBr react completely in the following equation? FeBr₂ + K₂S $\rarr$ 2KBr + FeS

A)0.0588
B)0.235
C)4.25
D)17.0

Question 52

What mass of carbon monoxide is produced when 1.50 moles of oxygen react completely in the following equation? 2C + O₂ $\rarr$ 2CO

A)84.0g
B)42.0g
C)28.0g
D)21.0g

Question 53

What mass of carbon dioxide is produced when 3.00 moles of oxygen react completely in the following equation? 2CO + O₂ $\rarr$ 2CO₂

A)88.0g
B)44.0g
C)29.3g
D)264g

Question 54

What mass of CO₂ is produced when 50.0g of C₂H₄ reacts completely in the following equation? C₂H₄ + 3O₂ $\rarr$ 2CO₂ + 2H₂O

A)12.3g
B)39.2g
C)49.4g
D)157g

Question 55

What mass of H₂O is produced when 60.0g of CH₄ reacts completely in the following equation? CH₄ + 2O₂ $\rarr$ CO₂ + 2H₂O

A)2.41g
B)9.64g
C)33.7g
D)135g

Question 56

What mass of H₂O is produced when 0.400 moles of KOH react completely in the following equation? KOH + HCl $\rarr$ KCl + H₂O

A)7.21g
B)18.0g
C)45.1g
D)90.2g

Question 57

How many moles of carbon monoxide are produced when 40.0g of oxygen react completely in the following equation? 2C + O₂ $\rarr$ 2CO

A)0.625
B)1.25
C)2.50
D)80.0

Question 58

What mass of NH₃ is produced when 1.20 moles of H₂ react completely in the following equation? N₂ + 3H₂ $\rarr$ 2NH₃

A)34.1g
B)20.4g
C)13.6g
D)30.7g

Question 59

What mass of H₂O is produced when 12.0g of HCl react completely in the following equation?
6HCl + Fe₂O₃ $\rarr$ 2FeCl₃ + 3H₂O

A)2.97g
B)39.4g
C)27.4g
D)110.g

Question 60

What mass of CO₂ will be produced when 100.g of C₈H₁₈ react completely in the followingequation? 2C₈H₁₈ + 25O₂ $\rarr$ 16CO₂ + 18H₂O

A)0.00249g
B)6.29g
C)308g
D)402g

Question 61

Calculate how much ethanol,C₂H₅OH,will be produced from the reaction of 590.g of sugar (C₆H₁₂O₆)if the reaction has a 88.5% yield. C₆H₁₂O₆ 2C₂H₅OH + 2CO₂

A)302 g
B)170.g
C)267 g
D)134 g

Question 62

Calculate the percent yield for the following reaction if 233 g of NO₂ reacted and 175 g of HNO₃ were produced. 3NO₂ + H₂O 2HNO₃ + NO

A)75.1%
B)82.2%
C)27.4%
D)60.8%

Question 63

In a reaction to produce chlorine gas,the theoretical yield is 25.6g.What is the percent yield if the actual yield is 20.2g?

A)21.1%
B)127%
C)20.2%
D)78.9%

Question 64

Which is the limiting reactant when 12.0 moles of CH₄ are reacted with 20.0 moles of O₂ in the following equation? CH₄ + 2O₂ $\rarr$ CO₂ + 2H₂O

A)CH₄
B)O₂
C)CO₂
D)H₂O

Question 65

Which is the limiting reactant when 3.00 moles of copper are reacted with 3.00 moles of silver nitrate in the following equation?
Cu + 2AgNO₃ $\rarr$ Cu(NO₃)₂ + 2Ag

A)Cu
B)AgNO₃
C)Cu(NO₃)₂
D)Ag

Question 66

Which substances are in excess when 3.00 moles of Pb,1.50 moles of PbO₂,and 5.00 moles of H₂SO₄ are reacted in the following equation? Pb + PbO₂ + 2H₂SO₄ $\rarr$ 2PbSO₄ + 2H₂O

A)Pb and PbO₂
B)Pb and H₂SO₄
C)PbO₂ and H₂SO₄
D)PbSO₄ and H₂O

Question 67

Which substance is in excess when 6.00 moles of aluminum are reacted with 12.00 moles ofoxygen in the following equation? 4Al + 3O₂ $\rarr$ 2Al₂O₃

A)Al
B)O₂
C)Al₂O₃

Question 68

Calculate the percent yield for the following reaction if 76.8 g of H₂O reacted and 125 g of NO were produced. 3NO₂ + H₂O 2HNO₃ + NO

A)99.0%
B)61.4%
C)60.0%
D)97.7%

Question 69

Which is the limiting reactant when 3.00 moles of calcium are reacted with 8.00 moles of water in the following equation? Ca + 2H₂O $\rarr$ Ca(OH)₂ + H₂

A)Ca
B)H₂O
C)Ca(OH)₂
D)H₂

Question 70

Which substance is in excess when 2.00 moles of cobalt are reacted with 1.50 moles of lead(II)chloride in the following equation? Co + PbCl₂ $\rarr$ CoCl₂ + Pb

A)Co
B)PbCl₂
C)CoCl₂
D)Pb

Question 71

What mass of sulfur dioxide is produced when 18.0g of sulfur react completely in the following equation? S + O₂ $\rarr$ SO₂

A)0.00876g
B)0.0278g
C)36.0g
D)114g

Question 72

In a reaction to produce iron the theoretical yield is 340 kg.What is the percent yield if the actual yield is 300.kg?

A)13.3%
B)88.2%
C)11.8%
D)113%

Question 73

Which substance is in excess when 1.50 moles of aluminum bromide are reacted with 2.50 moles of barium hydroxide in the following equation? 2AlBr₃ + 3Ba(OH)₂ $\rarr$ 3BaBr₂ + 2Al(OH)₃

A)BaBr₂
B)Al(OH)₃
C)Ba(OH)₂
D)AlBr₃

Question 74

What is the percent yield for a reaction in which 342g of a product is actually produced when the theoretical yield is 400.g?

A)10.5%
B)80.0%
C)97.6%
D)85.5%

Question 75

Calculate how much acetylene (C₂H₂)can be produced from 358 g of H₂O and an excess of CaC₂ if the percent yield for this reaction is 94.5%. CaC₂ + 2H₂O C₂H₂ + Ca(OH)₂

A)338 g
B)489 g
C)244 g
D)259 g

Question 76

In a reaction to produce sulfuric acid,the theoretical yield is 300.g.What is the percent yield if the actual yield is 280.g?

A)6.67%
B)7.14%
C)93.3%
D)107%

Question 77

What is the percent yield in a reaction in which 1.038g of a product is actually produced when the theoretical yield is 1.132g?

A)8.304%
B)109.1%
C)89.16%
D)91.70%

Question 78

Which is the limiting reactant when 3.00 moles of MnO₂ are reacted with 10.0 moles of HClin the following equation? MnO₂ + 4HCl $\rarr$ MnCl₂ + 2H₂O + Cl₂

A)MnO₂
B)HCl
C)MnCl₂
D)H₂O

Question 79

In a reaction to produce ammonia,the theoretical yield is 420.g.What is the percent yield if the actual yield is 350.g?

A)83.3%
B)20.0%
C)16.7%
D)120.%

Question 80

What is the percent yield for a reaction in which 24.6g of a product is actually produced when the theoretical yield is 30.0g?

A)82.0%
B)122%
C)21.0%
D)18.0%