Question 1

Which of the following is a formula for the compound iridium(III) bromide tetrahydrate?

Accepted Answer

A)  IrBr∙  12\frac{1}{2}21​  H2O
B)  IrBr∙4H2O
C)  IrBr3∙4H2O
D)  IBr3∙4H2O
E)  IBr3∙2H2O F) A) and E)
G) A) and B)

Question 2

Identify the correct formula for aluminum sulfate.

Accepted Answer

A)  Al2SO4
B)  Al(SO4) 3
C)  Al3(SO4) 2
D)  Al2(SO4) 3E) None of the above
F) C) and D)

Question 3

Give the mass percent of carbon in C14H19NO2.

Accepted Answer

A)  38.89%
B)  71.46%
C)  5.17%
D)  2.78%E) A) and B)
F) A) and C)

Question 4

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

Accepted Answer

Question 5

Identify the formula for chromium(II) nitrate.

Accepted Answer

A)  Cr(NO2) 3
B)  Cr(NO3) 3
C)  Cr(NO3) 2
D)  Cr(NO2) 2
E)  Cr2NO2F) A) and B)
G) A) and C)

Question 6

Identify an amine.

Accepted Answer

A)  CH3CH2OCH2CH3
B)  CH3CH2OH
C)  CH3CH2NH2
D)  CH3CH2CH2CH3
E)  CH3COOHF) None of the above
G) A) and B)

Question 7

Determine the name for aqueous HBr.

Accepted Answer

A)  bromic acid
B)  bromous acid
C)  hydrobromous acid
D)  hydrogen bromate
E)  hydrobromic acidF) None of the above
G) D) and E)

Question 8

Identify the name for Ca3(PO4) 2.

Accepted Answer

A)  calcium(III) phosphite
B)  calcium(II) phosphite
C)  calcium phosphate
D)  tricalcium phosphorustetraoxide
E)  calcium phosphiteF) A) and E)
G) A) and D)

Question 9

Calculate the molar mass for Mg(ClO4) 2.

Accepted Answer

A)  223.21 g mol-1
B)  123.76 g mol-1
C)  119.52 g mol-1
D)  247.52 g mol-1
E)  75.76 g mol-1F) C) and E)
G) A) and B)

Question 10

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

Accepted Answer

A)  0.933 g
B)  10.0 g
C)  23.3 g
D)  146 gE) A) and B)
F) All of the above

Question 11

Describe the difference between ionic and molecular compounds.Give an example of each.

Accepted Answer

An ionic compound is formed between a me...

Question 12

How many Fe(II) ions are there in 20.0 g of FeSO4?

Accepted Answer

A)  2.19 × 10-25 iron(II) ions
B)  7.92 × 1022 iron(II) ions
C)  4.57 × 1024 iron(II) ions
D)  1.82 × 1027 iron(II) ionsE) C) and D)
F) B) and C)

Question 13

Formic acid,HCOOH,is a major component in ant bites.Calculate the mass,in grams,of 3.14 × 1023 molecules of formic acid.

Accepted Answer

A)  0.0113 g
B)  0.0417 g
C)  24.0 g
D)  11.3 g
E)  0.0799 gF) D) and E)
G) None of the above

Question 14

How many molecules are in 114.86 g of vitamin C,C6H8O6?

Accepted Answer

A)  1.218 × 1028
B)  3.927 × 1023
C)  2.546 × 10-24
D)  2.977 × 1019
E)  2.977 × 1022F) All of the above
G) C) and D)

Question 15

The solid compound Na2CO3 contains

Accepted Answer

A)  Na+,C4+,and O2- ions.
B)  Na+ and CO3 -2 ions.
C)  Na2+ and CO3 -2 ions.
D)  Na2CO3 molecules.E) B) and C)
F) C) and D)

Question 16

Why aren't prefixes used in naming ionic compounds?

Accepted Answer

The charges on the ions dictat...

Question 17

Describe the difference between an atomic element and a molecular element.

Accepted Answer

Atomic elements exist in natur...

Question 18

What is the empirical formula of a substance that contains 2.64 g of C,0.887 g of H,and 3.52 g of O?

Accepted Answer

A)  CH4O 
B)  C2H4O2
C)  C2H4O3
D)  C3H4O4E) A) and B)
F) None of the above

Question 19

Define empirical formula.

Accepted Answer

An empirical formula...

Question 20

In which set do all elements tend to form anions in binary ionic compounds?

Accepted Answer

A)  C,S,Pb
B)  K,Fe,Br
C)  Li,Na,K
D)  N,O,IE) All of the above
F) B) and C)

Exam 3: Molecules,compounds,and Nomenclature

Identify the formula for chromium(II) nitrate.

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Formic acid,HCOOH,is a major component in ant bites.Calculate the mass,in grams,of 3.14 × 1023 molecules of formic acid.

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Identify the name for Ca3(PO4) 2.

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How many Fe(II) ions are there in 20.0 g of FeSO4?

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In which set do all elements tend to form anions in binary ionic compounds?

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Which of the following is a formula for the compound iridium(III) bromide tetrahydrate?

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Define empirical formula.

Correct AnswerverifiedAn empirical formula...View AnswerShow Answer

The solid compound Na2CO3 contains

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How many molecules are in 114.86 g of vitamin C,C6H8O6?

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

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What is the empirical formula of a substance that contains 2.64 g of C,0.887 g of H,and 3.52 g of O?

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Identify an amine.

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Calculate the molar mass for Mg(ClO4) 2.

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Identify the correct formula for aluminum sulfate.

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Describe the difference between ionic and molecular compounds.Give an example of each.

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What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

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Give the mass percent of carbon in C14H19NO2.

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Determine the name for aqueous HBr.

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Why aren't prefixes used in naming ionic compounds?

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Describe the difference between an atomic element and a molecular element.

Correct AnswerverifiedAtomic elements exist in natur...View AnswerShow Answer

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Formic acid,HCOOH,is a major component in ant bites.Calculate the mass,in grams,of 3.14 × 10²³molecules of formic acid.

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Identify the name for Ca₃(PO₄) ₂.

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How many Fe(II) ions are there in 20.0 g of FeSO₄?

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An empirical formula...
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The solid compound Na₂CO₃ contains

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How many molecules are in 114.86 g of vitamin C,C₆H₈O₆?

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

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Calculate the molar mass for Mg(ClO₄) ₂.

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An ionic compound is formed between a me...
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What mass of phosphorus pentafluoride,PF₅,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

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Give the mass percent of carbon in C₁₄H₁₉NO₂.

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The charges on the ions dictat...
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Atomic elements exist in natur...
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