Question 1

Describe a structural formula.

Accepted Answer

In a structural formula,lines ...

Question 2

Determine the mass percent (to the hundredths place) of H in sodium bicarbonate (NaHCO3) .

Accepted Answer

A)   1.20
B)   14.30
C)   57.14
D)   27.36
E)   19.05F) A) and B)
G) B) and C)

Question 3

The chemical formula for barium nitride is

Accepted Answer

A)   Ba(NO3) 3.
B)   Ba(NO2) 2.
C)   Ba3N2.
D)   BaN2.
E)   Mg2N3F) None of the above
G) A) and B)

Question 4

Give the structure for sodium periodate.

Accepted Answer

A)   Na2IO4
B)   NaIO 
C)   NaIO3
D)   NaIO4E) A) and B)
F) B) and D)

Question 5

What is the mass of 8.00 × 1022 molecules of NH3?

Accepted Answer

A)   0.00780 g
B)   0.442 g
C)   2.26 g
D)   128 gE) A) and C)
F) A) and D)

Question 6

Write the formula for the compound formed between aluminum and sulfur.

Accepted Answer

A)   Al2S3
B)   Al3S 
C)   AlS3
D)   Al2S 
E)   (AlS) 3F) B) and D)
G) B) and C)

Question 7

How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Accepted Answer

A)   9.83 × 1020 C2H4 molecules
B)   7.74 × 1026 C2H4 molecules
C)   2.71 × 1020 C2H4 molecules
D)   3.69 × 1023 C2H4 molecules
E)   4.69 × 1023 C2H4 moleculesF) C) and D)
G) A) and B) A

Question 8

How many moles of PF3 contain 3.68 × 1025 fluorine atoms?

Accepted Answer

A)   61.1 moles PF3
B)   20.4 moles PF3
C)   16.4 moles PF3
D)   54.5 moles PF3
E)   49.1 moles PF3F) D) and E)
G) A) and D)

Question 9

Calculate the molar mass for Ba(ClO4) 2.

Accepted Answer

A)   336.23 g/mol
B)   236.78 g/mol
C)   99.45 g/mol
D)   137.33 g/mol
E)   188.78 g/molF) C) and D)
G) A) and E)

Question 10

Give the formula for lithium chromate.

Accepted Answer

A)   LiCrO3
B)   Li2Cr2O7
C)   Li2CrO4
D)   Li2Cr2O5
E)   LiCr3O7F) B) and C)
G) A) and E) C

Question 11

Balance the following equation.
_____ C9H20 + _____ O2 → _____ H2O + _____ CO2

Accepted Answer

C₉H₂₀ + 14 O₂→ 10 H₂O + 9 CO₂

Question 12

What type of bonding is found in the compound PCl5?

Accepted Answer

A)   covalent bonding
B)   hydrogen bonding
C)   ionic bonding
D)   metallic bondingE) B) and C)
F) A) and D)

Question 13

How many Fe(II) ions are there in 15.0 g of FeSO4?

Accepted Answer

A)   1.64 × 10-25 iron(II)  ions
B)   5.94 × 1022 iron(II)  ions
C)   6.10 × 1024 iron(II)  ions
D)   1.37 × 1027 iron(II)  ionsE) A) and B)
F) A) and C)

Question 14

How much calcium is contained in 35.0 g of calcium fluoride?

Accepted Answer

A)   1.99 g
B)   7.70 g
C)   15.0 g
D)   18.0 gE) All of the above
F) A) and B)

Question 15

Give the formula for barium bisulfate.

Accepted Answer

A)   BaHSO4
B)   Ba2(HSO3) 2
C)   Ba2HSO4
D)   Ba(HSO4) 2E) B) and D)
F) All of the above

Question 16

6.00 moles of sodium perchlorate contains the same number of atoms as

Accepted Answer

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

Question 17

Identify rubbing alcohol.

Accepted Answer

A)   CH3CH2CH2OH
B)   CH3CH2OH
C)   CH3OH
D)   (CH3) 2CHOH
E)   HOCH2CH2OHF) B) and E)
G) B) and D)

Question 18

Which of the following is an ionic compound?

Accepted Answer

A)   SCl2
B)   MgCl2
C)   Cl2O
D)   CH2O
E)   PCl5F) A) and C)
G) A) and E)

Question 19

How many chloride ions are there in 7.50 mol of aluminum chloride?

Accepted Answer

A)   3.00 chloride ions
B)   22.5 chloride ions
C)   4.52 × 1024 chloride ions
D)   1.35 × 1025 chloride ionsE) None of the above
F) A) and D)

Question 20

Calculate the mass percent composition of sulfur in Al2(SO4) 3.

Accepted Answer

A)   28.12%
B)   9.372%
C)   42.73%
D)   21.38%
E)   35.97%F) C) and D)
G) D) and E)

Exam 3: Molecules,compounds,and Chemical Equations

Describe a structural formula.

Correct AnswerverifiedIn a structural formula,lines ...View AnswerShow Answer

Determine the mass percent (to the hundredths place) of H in sodium bicarbonate (NaHCO3) .

Correct AnswerverifiedShow Answer

The chemical formula for barium nitride is

Correct AnswerverifiedShow Answer

Give the structure for sodium periodate.

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What is the mass of 8.00 × 1022 molecules of NH3?

Correct AnswerverifiedShow Answer

Write the formula for the compound formed between aluminum and sulfur.

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How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Correct AnswerverifiedA

How many moles of PF3 contain 3.68 × 1025 fluorine atoms?

Correct AnswerverifiedShow Answer

Calculate the molar mass for Ba(ClO4) 2.

Correct AnswerverifiedShow Answer

Give the formula for lithium chromate.

Correct AnswerverifiedC

Balance the following equation. _____ C9H20 + _____ O2 → _____ H2O + _____ CO2

Correct AnswerverifiedC9H20 + 14 O2 → 10 H2O + 9 CO2

What type of bonding is found in the compound PCl5?

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How many Fe(II) ions are there in 15.0 g of FeSO4?

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How much calcium is contained in 35.0 g of calcium fluoride?

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Give the formula for barium bisulfate.

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6.00 moles of sodium perchlorate contains the same number of atoms as

Correct AnswerverifiedShow Answer

Identify rubbing alcohol.

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Which of the following is an ionic compound?

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How many chloride ions are there in 7.50 mol of aluminum chloride?

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Calculate the mass percent composition of sulfur in Al2(SO4) 3.

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In a structural formula,lines ...
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Determine the mass percent (to the hundredths place) of H in sodium bicarbonate (NaHCO₃) .

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What is the mass of 8.00 × 10²² molecules of NH₃?

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How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol.

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A

How many moles of PF₃ contain 3.68 × 10²⁵ fluorine atoms?

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Calculate the molar mass for Ba(ClO₄) ₂.

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Balance the following equation. ___ C₉H₂₀ + _ O₂→ _ H₂O + ___ CO₂

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C₉H₂₀ + 14 O₂→ 10 H₂O + 9 CO₂

What type of bonding is found in the compound PCl₅?

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How many Fe(II) ions are there in 15.0 g of FeSO₄?

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Calculate the mass percent composition of sulfur in Al₂(SO₄) ₃.

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