Question 1

Which of the following compounds is nail polish remover?

Accepted Answer

A)   (CH3) 2C=O
B)   CH3CH2Cl
C)   C2H6
D)   CH3CO2H 
E)   CH3SCH3F) A) and B)
G) A) and C)

Question 2

Calculate the molar mass of Ca3(PO4) 2.

Accepted Answer

A)   87.05 g/mol
B)   215.21 g/mol
C)   310.18 g/mol
D)   279.21 g/mol
E)   246.18 g/molF) None of the above
G) B) and E)

Question 3

Determine the name for aqueous HCl.

Accepted Answer

A)   chloric acid
B)   chlorous acid
C)   hydrochlorous acid
D)   hydrogen chlorate
E)   hydrochloric acidF) A) and B)
G) D) and E)

Question 4

6.00 moles of barium perchlorate contains the same number of ions as

Accepted Answer

A)   6.00 moles of lithium permanganate.
B)   6.00 moles of sodium phosphate.
C)   6.00 moles of barium bisulfite.
D)   6.00 moles of lithium hydroxide.
E)   6.00 moles of potassium nitrite.F) C) and E)
G) C) and D)

Question 5

Write the formula for magnesium nitride.

Accepted Answer

A)   Mg3N2
B)   Mg(NO3) 2
C)   MgN
D)   Mg2N3
E)   Mg(NO2) 2F) A) and E)
G) B) and C)

Question 6

How many moles of C5H8 contain 4.95 × 1024 hydrogen atoms?

Accepted Answer

A)   8.22 moles C5H8
B)   6.58 moles C5H8
C)   1.03 moles C5H8
D)   9.73 moles C5H8
E)   3.09 moles C5H8F) B) and E)
G) All of the above

Question 7

Which of the following compounds is ethanol?

Accepted Answer

A)   C4H8
B)   CH3CH2OH
C)   CH3CO2CH3
D)   CH3CH2F
E)   CH3SCH3F) B) and C)
G) None of the above

Question 8

Which one of the following is NOT an empirical formula?

Accepted Answer

A)   CHO
B)   CH2O 
C)   C2H4O
D)   C2H6O2
E)   C3H8OF) A) and D)
G) A) and E)

Question 9

Which of the following has the greatest mass?

Accepted Answer

A)   7.75 × 1022 molecules of O2
B)   2.00 g of O2
C)   0.0625 mol of O2
D)   All of the above have the same mass.E) C) and D)
F) B) and D)

Question 10

Which of the following compounds is vinegar?

Accepted Answer

A)   C4H6
B)   CH3CH2Cl
C)   CH3CO2H
D)   CH3CO2CH3
E)   CH3SCH3F) C) and D)
G) A) and E)

Question 11

Give the name for KHSO3.

Accepted Answer

A)   monopotassium bisulfide
B)   monopotassium bisulfate
C)   potassium bisulfate
D)   potassium bisulfite
E)   potassium bisulfideF) A) and C)
G) B) and E)

Question 12

Identify the element whose ion only exists as 2+.

Accepted Answer

A)   calcium
B)   cesium
C)   lead
D)   carbon
E)   radonF) C) and E)
G) A) and C)

Question 13

Which of the following is an atomic element?

Accepted Answer

A)   bromine
B)   hydrogen
C)   oxygen
D)   fluorine
E)   lithiumF) A) and E)
G) B) and E)

Question 14

How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

Accepted Answer

A)   5.54 × 1025 N2O4 molecules
B)   7.26 × 1023 N2O4 molecules
C)   1.38 × 1024 N2O4 molecules
D)   4.59 × 1025 N2O4 molecules
E)   4.99 × 1023 N2O4 moleculesF) A) and B)
G) B) and E)

Question 15

Identify the compound used in welding torches.

Accepted Answer

A)   methanol
B)   propylamine
C)   propanal
D)   acetylene
E)   acetoneF) B) and E)
G) All of the above

Question 16

How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

Accepted Answer

A)   7.02 × 103 moles
B)   1.42 × 10-4 moles
C)   1.00 mole
D)   1.21 moles
E)   0.829 molesF) A) and B)
G) B) and D)

Question 17

Give the formula for sulfurous acid.

Accepted Answer

A)   H2SO3
B)   HSO3
C)   H2SO4
D)   HSO4E) B) and D)
F) A) and D)

Question 18

What is the mass of 9.86 × 1024 molecules of CO2? The molar mass of CO2 is 44.01 g/mol.

Accepted Answer

A)   205 g
B)   294 g
C)   720 g
D)   341 g
E)   685 gF) None of the above
G) A) and E)

Question 19

Calculate the molar mass of H2CO3.

Accepted Answer

A)   62.03 g/mol
B)   29.02 g/mol
C)   61.02 g/mol
D)   60.01 g/mol
E)   74.04 g/molF) C) and D)
G) B) and C)

Question 20

Identify an ether.

Accepted Answer

A)   CH3CH2OCH2CH3
B)   CH3CH2Br
C)   CH3CH2PH2
D)   CH3CH2CH2CH3
E)   CH3COOH F) B) and C)
G) A) and C)

Exam 3: Molecules,compounds,and Chemical Equations

Identify the element whose ion only exists as 2+.

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Identify the compound used in welding torches.

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How many moles of C5H8 contain 4.95 × 1024 hydrogen atoms?

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Write the formula for magnesium nitride.

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Which of the following compounds is vinegar?

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Calculate the molar mass of Ca3(PO4) 2.

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Which of the following compounds is nail polish remover?

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What is the mass of 9.86 × 1024 molecules of CO2? The molar mass of CO2 is 44.01 g/mol.

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Which of the following compounds is ethanol?

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Which of the following is an atomic element?

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Give the name for KHSO3.

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Determine the name for aqueous HCl.

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Which one of the following is NOT an empirical formula?

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How many moles of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

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Which of the following has the greatest mass?

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Give the formula for sulfurous acid.

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How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.02 g/mol.

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Identify an ether.

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Calculate the molar mass of H2CO3.

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6.00 moles of barium perchlorate contains the same number of ions as

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How many moles of C₅H₈ contain 4.95 × 10²⁴ hydrogen atoms?

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Calculate the molar mass of Ca₃(PO₄) ₂.

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What is the mass of 9.86 × 10²⁴ molecules of CO₂? The molar mass of CO₂ is 44.01 g/mol.

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Give the name for KHSO₃.

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How many moles of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

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How many molecules of N₂O₄ are in 76.3 g N₂O₄? The molar mass of N₂O₄ is 92.02 g/mol.

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Calculate the molar mass of H₂CO₃.

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