Deck 4: Molecules, Compounds, and Chemical Reactions

Question 1

Which statement about ionic compounds is incorrect ?

A)Ionic compounds include table salt, calcium carbonate, and sodium bicarbonate .
B)Ionic solids dissolved in water will conduct electricity.
C)Ionic bonds are formed between metals and nonmetals.
D)Ionic bonds involve the sharing of electrons by metals and nonmetals.
E)Ionic compounds are held together by attraction between positive and negative ions.

Answer 1

Ionic bonds involve the sharing of electrons by metals and nonmetals.

Question 2

Which of these is the correct chemical formula for carbon tetrachloride?

A)CCl₃
B)CCl₄
C)CCl₅
D)C₄Cl
E)None of the above

Answer 2

CCl₄

Question 3

Which of these substances is a compound?

A)Na
B)Cl₂
C)Pb
D)NO
E)H₂

Answer 3

NO

Question 4

Which of these will not form a negative ion in an ionic compound?

A)Br
B)N
C)Se
D)I
E)Al

Question 5

A tiny crystal of sodium chloride contains 5,000,000 sodium ions and 5,000,000 chloride ions. The correct formula for sodium chloride is:

A)NaCl
B)Na₅Cl₅
C)Na₅₀Cl₅₀
D)It could be any of the above.
E)None of the above

Question 6

Which of these is not a covalent compound?

A)SiO₂
B)CH₄
C)N₂O
D)CaO
E)ICl₃

Question 7

The correct formula for the sulfate ion is:

A)SO₃ ⁻
B)SO₃ ²⁻
C)SO₄ ⁻
D)SO₄ ²⁻
E)none of the above

Question 8

For an ionic compound, X₂Y₅, if the charge on each Y ion is − 2, the charge on each X ion is:

A)− 2
B)− 5
C)− 10
D)+10
E)+5

Question 9

Which of these statements about covalent compounds is incorrect ?

A)Covalent bonds involve the combination of two nonmetals.
B)Covalent compounds dissolve in water to form electrolyte solutions.
C)Covalent compounds contain atoms which share electrons to gain stability.
D)Molecules are represented by a specific kind of chemical formula .
E)Electrons in covalent compounds are not always equally shared between atoms.

Question 10

Nonmetals tend to ____ electrons and form ions with a ____ charge.

A)lose, positive
B)lose, negative
C)gain, positive
D)gain, negative
E)lose , zero

Question 11

Which of these is an ionic compound?

A)NCl₃
B)Li₂O
C)PF₅
D)CH₄
E)I₂

Question 12

Which of these is an ionic compound?

A)AlCl₃
B)H₂O
C)SiO₂
D)IBr
E)S₈

Question 13

Metals tend to ____ electrons and form ions with a ____ charge.

A)lose, positive
B)lose, negative
C)gain, positive
D)gain, negative
E)lose , zero

Question 14

Which of these substances is not a mixture of different compounds?

A)Air
B)Salt water
C)Gasoline
D)Table salt
E)Lemonade

Question 15

Which of these is the correct ratio of sulfur to oxygen in SO₂?

A)1 sulfur: 2 oxygen
B)2 sulfur: 1 oxygen
C)2 sulfur: 2 oxygen
D)2 sulfur: 3 oxygen
E)1 sulfur: 3 oxygen

Question 16

Which of these is not a covalent compound?

A)H₂O
B)TeCl₄
C)XeF₄
D)C₂H₂
E)AlCl₃

Question 17

A tiny amount of magnesium chloride contains 150 magnesium ions and 300 chloride ions. The correct formula for magnesium chloride is:

A)MgCl
B)Mg₂Cl
C)MgCl₂
D)Mg₁₅₀Cl₃₀₀

Question 18

Which of these will not form a positive ion in an ionic compound?

A)Ba
B)Rb
C)P
D)Sn
E)Mg

Question 19

Barium fluoride is often used in glass manufacturing. Which of these is the correct formula and bonding type for barium fluoride?

A)BaF, ionic
B)BaF, covalent
C)BaF₂, ionic
D)BaF₂, covalent
E)Ba₂F, ionic

Question 20

Methane can be decomposed into two simpler substances, hydrogen and carbon. Therefore, methane

A)is a gas.
B)is an element.
C)is a mixture.
D)is a compound.
E)must have the formula CH.

Question 21

Calculate the number of oxygen atoms in 45.0 g of Co₂(SO₄)₃ (molar mass =405.8 g\mole).

A)8.01 × 10²³ atoms
B)2.67 × 10²³ atoms
C)12.0 atoms
D)6.68 × 10²² atoms
E)1.07 × 10²⁴ atoms

Question 22

Determine the number of moles in a 1.95 × 10 ^{− 2} gram sample of the amino acid glycine, CH₂(NH₂)CO₂H.

A)2.6 × 10 ^{− 4} moles
B)2.6 × 10 ^{− 2} moles
C)1.46 moles
D)2.0 × 10 ^{− 2} moles
E)3.85 × 10 ^{− 1} moles

Question 23

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many anteaters can a zoo obtain in exchange for 4 oryxes?

A)6 anteaters
B)10 anteaters
C)15 anteaters
D)20 anteaters
E)30 anteaters

Question 24

Which of the following does not contain the same number of chlorine atoms as 60 CCl₄ molecules?

A)240 HCl molecules
B)120 chlorine molecules
C)40 SCl₆ molecules
D)80 CFCl₃ molecules
E)60 CHCl₃ molecules

Question 25

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many flamingos can a zoo obtain in exchange for 6 rhinos?

A)10 flamingos
B)30 flamingos
C)50 flamingos
D)120 flamingos
E)160 flamingos

Question 26

Which of the following is not true for 3 moles of CaCO₃?

A)It contains 3 moles of O.
B)It contains 3 moles of Ca.
C)It contains 3 moles of C.
D)It contains 9 moles of O.
E)None of the above.

Question 27

How many moles of caffeine are in 1.250 kg sample, C₈H₁₀N₄O₂?

A)6.4 × 10 ^{− 6} moles
B)0.006 moles
C)0.008 moles
D)6.44 moles
E)8.56 moles

Question 28

How many grams are in 2.35 moles of calcium carbonate, CaCO₃?

A)0.01175 grams
B)0.0235 grams
C)0.0588 grams
D)107 grams
E)235 grams

Question 29

Calculate the mass in grams of a 1.070 moles of acetylene, C₂H₂.

A)0.02434 grams
B)0.04415 grams
C)14.98 grams
D)25.68 grams
E)27.82 grams

Question 30

How many moles of carbon atoms are in 1.574 g of novocain, C₁₃H₂₁N₂O₂Cl?

A)0.01008 moles
B)0.005776 moles
C)0.07510 moles
D)0.12096 moles
E)0.006148 moles

Question 31

What is the molecular weight of PCl₃?

A)66.5 amu
B)106.5 amu
C)137.5 amu
D)180 amu
E)360 amu

Question 32

How many moles of potassium cyanide are in a 113.5 gram sample of KCN?

A)3.487 moles
B)2.903 moles
C)1.743 moles
D)0.872 moles
E)0.0173 moles

Question 33

An international group of zookeepers with successful breeding programs made the following animal exchanges last year. Using the same bartering system, how many monkeys can a zoo obtain in exchange for 10 camels?

A)6 monkeys
B)12 monkeys
C)15 monkeys
D)24 monkeys
E)30 monkeys

Question 34

How many chromium atoms are in 78.8 g or K₂Cr₂O₇?

A)2.24 × 10²⁴ atoms
B)1.12 × 10²⁴ atoms
C)3.23 × 10²³ atoms
D)1.61 × 10²³ atoms
E)2.25 × 10²² atoms

Question 35

How many moles of oxygen atoms are in a 0.6163 grams of niacin, C₆H₅NO₂?

A)5.14 × 10 ^{− 2} moles
B)3.00 × 10 ^{− 2} moles
C)1.00 × 10 ^{− 2} moles
D)5.01 × 10 ^{− 3} moles
E)8.56 × 10 ^{− 3} moles

Question 36

Nicotine has the chemical formula C₁₀H₁₄N₂. What is the molecular weight of nicotine?

A)26 amu
B)81 amu
C)138 amu
D)162 amu
E)366 amu

Question 37

What is the molecular weight of cholesterol, C₂₇H₄₆O?

A)194 amu
B)208 amu
C)224 amu
D)180 amu
E)386 amu

Question 38

The correct formula for the nitrate ion is:

A)NO ⁻
B)NO ³⁻
C)NO₃ ⁻
D)NO₃ ²⁻
E)none of the above

Question 39

What is the molecular weight of boric acid, B(OH)₃?

A)51 amu
B)61.83 amu
C)101.3 amu
D)153 amu
E)306 amu

Question 40

How many hydrogen atoms are in 25.6 grams of sucrose, (C₁₂H₂₂O₁₁)?

A)1.647 atoms
B)2.6 × 10²³ atoms
C)4.51 × 10²² atoms
D)6.02 × 10²³ atoms
E)9.92 × 10²³ atoms

Question 41

How many moles of carbon atoms are in 5 moles of ethanol, CH₃CH₂OH?

A)2.5 mole
B)5 moles
C)10 moles
D)30 moles
E)120 moles

Question 42

Which of these is the correct formula for potassium phosphate?

A)KPO₄
B)K₃PO₄
C)K(PO₄)₃
D)K₂(PO₄)₃
E)K₃P

Question 43

What is the coefficient in front of HF when the equation is balanced?
__ B₂O₃ + __ HF → __ BF₃ + __ H₂O

A)1
B)2
C)3
D)5
E)6

Question 44

How many moles of calcium atoms are in 2.5 moles of calcium carbonate, CaCO₃?

A)1 mole
B)1.25 moles
C)2.5 moles
D)5.0 moles
E)100 moles

Question 45

How many moles of hydrogen atoms are in 3 moles of codeine, C₁₈H₂₁NO₃?

A)3 mole
B)21 moles
C)36 moles
D)54 moles
E)63 moles

Question 46

Using the old English measurements of volume listed, determine the number of gallons in two gills.

A)0.0039 gallons
B)64 gallons
C)0.0625  gallons
D)512 gallons
E)2304 gallons

Question 47

Which of these is the correct name for Li₂SO₄?

A)Lithium sulfide
B)Dilithium sulfide
C)Dilithium sulfate
D)Lithium sulfate
E)Dilithium tetrasulfide

Question 48

Which of these is the correct name for Rb₃N?

A)Rubidium nitride
B)Radon nitride
C)Trirubdium nitride
D)Triradon nitride
E)Rubidium trinitride

Question 49

What is the correct name of K₂O?

A)Dipotassium monoxide
B)Dipotassium oxide
C)Potassium monoxide
D)Potassium oxygen
E)Potassium oxide

Question 50

When properly balanced, what are the correct coefficients for the reaction: H₂ + O₂ → H₂O?

A)1,1,1
B)1,1\2,1
C)1,2,1
D)2,1,2
E)10,5,10

Question 51

Using the old English measurements of volume listed, determine the number of noggins in one butt.

A)104.92 noggins
B)128.00 noggins
C)209.83 noggins
D)1678.7 noggins
E)3357.3 noggins

Question 52

How many moles of nitrogen atoms are in 12 moles of NH₄NO₃?

A)6 mole
B)12 moles
C)14 moles
D)24 moles
E)28 moles

Question 53

Using the old English measurements of volume listed, determine the number of hogsheads in five kilderkins.

A)1.72 hogsheads
B)2.91 hogsheads
C)90 hogsheads
D)4,721 hogsheads
E)42,489 hogsheads

Question 54

Which of these is the correct name for MgCl₂?

A)Magnesium chloride
B)Magnesium chlorine
C)Magnesium dichloride
D)Magnesium monochloride
E)Monomagnesium dichloride

Question 55

Which of these is the correct name for N₂O₃?

A)Nitrogen trioxide
B)Trinitrogen dioxide
C)Dinitrogen trioxide
D)Nitrogen dioxygenide
E)Dinitrogenide dioxygenide

Question 56

How many atoms of aluminum are contained in a 36.0 ounce aluminum bat? 1 ounce = 28.35 grams

A)2.28 × 10²⁵
B)6.28 × 10 ^{− 23}
C)6.15 × 10²⁶
D)6.33 × 10²³
E)Can't tell from the given information

Question 57

Which of these is the correct formula for aluminum oxide?

A)Al₂O₂
B)Al₂O₃
C)AlO
D)Al₃O₂
E)AlO₂

Question 58

Which of these is the correct name for Ca(OH)₂?

A)Calcium carbonate
B)Calcium oxide
C)Calcium dihydride
D)Calcium oxygen hydride
E)Calcium hydroxide

Question 59

Which of these is the correct name for NaHCO₃?

A)Sodium carbonate
B)Sodium trioxide
C)Sodium monocarbide
D)Sodium bicarbonate
E)Sodium carbide oxide

Question 60

What is the coefficient in front of sodium nitride when the equation is balanced?
__ Na₃N → __ Na(s)+ __ N₂(g)

A)0
B)1
C)2
D)3
E)4

Question 61

Automotive air bags inflate when a sample of NaN₃ (molar mass = 65 g\mol)is rapidly decomposed. What mass of NaN₃ is required to produce 368 L of nitrogen gas (molar mass = 28 g\mol)with a density of 1.25 g\L?
2NaN₃(s)→ 2Na(s)+ 3N₂(g)

A)228 g
B)712 g
C)1709 g
D)2136 g
E)3203 g

Question 62

For the reaction:    4NH₃ + 5O₂ ® 6H₂O + 4NO
If 125.0 g of NH₃ is reacted with 225.0 g of O₂, how many grams of H₂O will be present after a complete reaction?

A)0 grams
B)151.9 grams
C)198.5 grams
D)350.0 grams

Question 63

How many moles of oxygen gas are needed to react with 9 moles of acetylene, C₂H₂?
​
2C₂H₂ + 5O₂(g)→ 4CO₂ + 2H₂O

A)0.4 moles
B)4.5 moles
C)9 moles
D)18 moles
E)22.5 moles

Question 64

Which of the following has the largest mass of oxygen ?

A)16.0 g of O₂
B)0.500 mol of O₂
C)2 moles of O atoms
D)10 grams of carbon dioxide CO₂
E)All of these have the same mass of oxygen.

Question 65

What is the coefficient in front of oxygen (O₂)when the equation is balanced?
__ C₃H₈ + __ O₂ → __ CO₂ + __ H₂O

A)2
B)3
C)4
D)5
E)10

Question 66

How many moles of tetraphosphorous decaoxide will form when 3.30 moles of P₄ react with oxygen gas?
P₄ + 5O₂ → P₄O₁₀

A)0.825 moles
B)3.3 moles
C)13.2 moles
D)16.5 moles
E)20 moles

Question 67

How many grams of nitrogen dioxide are required to produce 260 grams of nitrogen monoxide?
3NO₂ + H₂O → 2HNO₃ + NO

A)8.67 grams
B)56.52 grams
C)132 grams
D)399 grams
E)1196 grams

Question 68

For the reaction:    4NH₃ + 5O₂ ® 6H₂O + 4NO
If 125.0 g of NH₃ is reacted with 225.0 g of O , how many grams of NO will be present after a complete reaction?
​

A)0 grams
B)168.8 grams
C)220.6 grams
D)350.0 grams

Question 69

For the reaction:    4NH₃ + 5O₂ ® 6H₂O + 4NO
If 125.0 g of NH₃ is reacted with 225.0 g of O₂, how many grams of O₂ will be present after a complete reaction?
​

A)0 grams
B)125.0 grams
C)225.0 grams
D)350.0 grams

Question 70

Which of these is the correct SUM of the coefficients when the equation is balanced?
__ CaCl₂(aq)+ __ K₂CO₃(aq)→ __ KCl(aq)+ __ CaCO₃(s)

A)2
B)4
C)5
D)8
E)10

Question 71

How many grams of carbon dioxide are produced when 18.5 moles of oxygen react with excess acetylene, according to the following equation?
​
2C₂H₂ + 5O₂(g)→ 4CO₂ + 2H₂O

A)2,030 grams
B)814 grams
C)651 grams
D)88.0 grams
E)37.0 grams

Question 72

When properly balanced, what will the coefficients be in the equation, respectively?
​
__Mg + __N₂ → __Mg₃N₂

A)1,1,1
B)3,2,1
C)3,1,1
D)3,1,2
E)None of the above

Question 73

For the reaction:    4NH₃ + 5O₂ ® 6H₂O + 4NO
If 125.0 g of NH₃ is reacted with 225.0 g of O₂, what is the limiting reagent?
​

A)NH₃
B)O₂
C)H₂O
D)NO
E)None of the above.

Question 74

For the reaction:    4NH₃ + 5O₂ ® 6H₂O + 4NO
If 125.0 g of NH₃ is reacted with 225.0 g of O₂, how many grams of NH₃ will be present after a complete reaction?

A)0 grams
B)29.4 grams
C)95.6 grams
D)125.0 grams

Question 75

How many grams of water are produced when 10.0 grams of O₂ react with excess H₂?
2H₂ + O₂(g)→ 2H₂O

A)11.25 grams
B)20 grams
C)46 grams
D)180 grams
E)360 grams

Question 76

For the reaction:    4NH₃ + 5O₂ ® 6H₂O + 4NO
If 2.5 moles of NH₃ is reacted with 3.0 moles of O₂, what is the limiting reagent?

A)NH₃
B)O₂
C)H₂O
D)NO

Question 77

How many moles of oxygen gas will react with 6.2 moles of aluminum?
4Al(s)+ 3O₂(g)→ 2Al₂O₃(s)

A)0.12 moles
B)1.55 moles
C)2.4 moles
D)4.65 moles
E)8.27 moles

Question 78

How many grams of methanol (CH₃OH)are produced when 5.00 kg of H₂ reacts with excess carbon monoxide?
CO + 2H₂ → CH₃OH

A)40 g
B)80 g
C)320 g
D)640 g
E)40,000 g