Question 1

Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2.086 g of CO2 and 1.134 g of H2O. What is the empirical formula of the compound?

Accepted Answer

A)  C2H5O 
B)  C2H5O2 
C)  C2H10O3 
D)  C3H8O2

Question 2

Calculate the molar mass of H2CO3.

Accepted Answer

A)  62.03 g mol-1 
B)  29.02 g mol-1 
C)  61.02 g mol-1 
D)  60.01 g mol-1 
E)  74.04 g mol-1

Question 3

Describe a structural formula.

Accepted Answer

The answer of Describe a structural formula....

Question 4

Identify the formula for the compound formed between potassium and sulfur.

Accepted Answer

A)  KS 
B)  KS2 
C)  K2S 
D)  K2SO3 
E)  K3S2

Question 5

An ionic bond is best described as ________.

Accepted Answer

A)  the sharing of electrons 
B)  the transfer of electrons from one atom to another 
C)  the attraction that holds the atoms together in a polyatomic ion 
D)  the attraction between two nonmetal atoms 
E)  the attraction between two metal atoms

Question 6

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

Accepted Answer

The answer of Describe the difference between ionic and molecular...

Question 7

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)  Cr2NO2

Question 8

________ bonds occur between two or more nonmetals, which involve the sharing of electrons between the atoms.

Accepted Answer

A)  Ionic 
B)  Hydrogen 
C)  Metallic 
D)  Peptide 
E)  Covalent

Question 9

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO2 and 0.1451 g of H2O. What is the empirical formula of the compound?

Accepted Answer

A)  CH2 
B)  C2H5 
C)  C4H10 
D)  C5H2

Question 10

Calculate the mass percent composition of lithium in Li3PO4.

Accepted Answer

A)  26.75% 
B)  17.98% 
C)  30.72% 
D)  55.27% 
E)  20.82%

Question 11

Which of the following exists as a diatomic molecule?

Accepted Answer

A)  N 
B)  C 
C)  P 
D)  Na 
E)  Ne

Question 12

How many millimoles of Ca(NO3)2 contain 4.78 × 1022 formula units of Ca(NO3)2? The molar mass of Ca(NO3)2 is 164.10 g mol-1.

Accepted Answer

A)  12.6 mmol Ca(NO3)2 
B)  13.0 mmol Ca(NO3)2 
C)  20.7 mmol Ca(NO3)2 
D)  79.4 mmol Ca(NO3)2 
E)  57.0 mmol Ca(NO3)2

Question 13

A covalent bond is best described as ________.

Accepted Answer

A)  the sharing of electrons between atoms 
B)  the transfer of electrons 
C)  a bond between a metal and a nonmetal 
D)  a bond between a metal and a polyatomic ion 
E)  a bond between two polyatomic ions

Question 14

How can one compound contain both ionic and covalent bonds? Give an example.

Accepted Answer

The answer of How can one compound contain both ionic...

Question 15

Why aren't prefixes used in naming ionic compounds?

Accepted Answer

The answer of Why aren't prefixes used in naming ionic...

Question 16

What is the correct formula for lead (II) chloride?

Accepted Answer

A)  LdCl4 
B)  SbCl4 
C)  PbCl2 
D)  PbCl4 
E)  LaCl3

Question 17

Which of the following is a molecular compound?

Accepted Answer

A)  CuCl2 
B)  KCl 
C)  NaNO3 
D)  CH3Cl 
E)  RbBr

Question 18

Identify the formula for magnesium nitrate hexahydrate.

Accepted Answer

A)  Mg(NO3)2∙5H2O 
B)  Mg(NO3)2∙6H2O 
C)  Mg(NO3)2∙7H2O 
D)  MgNO3∙5H2O 
E)  MgNO3∙6H2O

Question 19

Identify the name for aqueous H2SO4.

Accepted Answer

A)  sulfuric acid 
B)  persulfurous acid 
C)  sulfurous acid 
D)  hyposulfurous acid 
E)  persulfuric acid

Question 20

Give the name for HNO₂.

Accepted Answer

The answer of Give the name for HNO₂....

Exam 3: Molecules, Compounds, and Nomenclature

Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2.086 g of CO₂ and 1.134 g of H₂O. What is the empirical formula of the compound?

Calculate the molar mass of H₂CO₃.

Describe a structural formula.

Identify the formula for the compound formed between potassium and sulfur.

An ionic bond is best described as ________.

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

Identify the formula for chromium(II) nitrate.

________ bonds occur between two or more nonmetals, which involve the sharing of electrons between the atoms.

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO₂ and 0.1451 g of H₂O. What is the empirical formula of the compound?

Calculate the mass percent composition of lithium in Li₃PO₄.

Which of the following exists as a diatomic molecule?

How many millimoles of Ca(NO₃) ₂ contain 4.78 × 10²² formula units of Ca(NO₃) ₂? The molar mass of Ca(NO₃) ₂ is 164.10 g mol^-1.

A covalent bond is best described as ________.

How can one compound contain both ionic and covalent bonds? Give an example.

Why aren't prefixes used in naming ionic compounds?

What is the correct formula for lead (II) chloride?

Which of the following is a molecular compound?

Identify the formula for magnesium nitrate hexahydrate.

Identify the name for aqueous H₂SO₄.

Give the name for HNO₂.

Exam 3: Molecules, Compounds, and Nomenclature

Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2.086 g of CO2 and 1.134 g of H2O. What is the empirical formula of the compound?

Calculate the molar mass of H2CO3.

Describe a structural formula.

Identify the formula for the compound formed between potassium and sulfur.

An ionic bond is best described as ________.

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

Identify the formula for chromium(II) nitrate.

________ bonds occur between two or more nonmetals, which involve the sharing of electrons between the atoms.

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO2 and 0.1451 g of H2O. What is the empirical formula of the compound?

Calculate the mass percent composition of lithium in Li3PO4.

Which of the following exists as a diatomic molecule?

How many millimoles of Ca(NO3) 2 contain 4.78 × 1022 formula units of Ca(NO3) 2? The molar mass of Ca(NO3) 2 is 164.10 g mol-1.

A covalent bond is best described as ________.

How can one compound contain both ionic and covalent bonds? Give an example.

Why aren't prefixes used in naming ionic compounds?

What is the correct formula for lead (II) chloride?

Which of the following is a molecular compound?

Identify the formula for magnesium nitrate hexahydrate.

Identify the name for aqueous H2SO4.

Give the name for HNO2.

Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2.086 g of CO₂ and 1.134 g of H₂O. What is the empirical formula of the compound?

Calculate the molar mass of H₂CO₃.

Combustion analysis of an unknown compound containing only carbon and hydrogen produced 0.2845 g of CO₂ and 0.1451 g of H₂O. What is the empirical formula of the compound?

Calculate the mass percent composition of lithium in Li₃PO₄.

How many millimoles of Ca(NO₃) ₂ contain 4.78 × 10²² formula units of Ca(NO₃) ₂? The molar mass of Ca(NO₃) ₂ is 164.10 g mol^-1.

Identify the name for aqueous H₂SO₄.

Give the name for HNO₂.