Question 1

The chemical formula for selenous acid is

Accepted Answer

A) H2Se(aq). 
B) HSeO3(aq). 
C) HSeO4(aq). 
D) H2Se2O7(aq). 
A) H2Se(aq). 
B) HSeO3(aq). 
C) HSeO4(aq). 
D) H2Se2O7(aq).

Question 2

Which one of the following contains 39% carbon by mass?

Accepted Answer

A) C2H2 
B) CH4 
C) CH3NH2 
D) CO2 
A) C2H2 
B) CH4 
C) CH3NH2 
D) CO2

Question 3

When forming ionic compounds, cations and anions form three-dimensional networks known as

Accepted Answer

A) a molecular compound. 
B) a space-filling compound. 
C) a lattice. 
D) an empirical formula. 
A) a molecular compound. 
B) a space-filling compound. 
C) a lattice. 
D) an empirical formula.

Question 4

Identify the formula for strontium nitride.

Accepted Answer

A) Sr3N2 
B) Sr(NO3)2 
C) SrN 
D) Sr2N3 
E) Sr(NO2)2 
A) Sr3N2 
B) Sr(NO3)2 
C) SrN 
D) Sr2N3 
E) Sr(NO2)2

Question 5

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 g 
A) 0.933 g 
B) 10.0 g 
C) 23.3 g 
D) 146 g

Question 6

Which of the following is a formula for the compound disulfur tetrafluoride?

Accepted Answer

A) SF4 
B) 2SF4 
C) S2F4 
D) SF6 
E) S2F2 
A) SF4 
B) 2SF4 
C) S2F4 
D) SF6 
E) S2F2

Question 7

Which of the following is a possible molecular formula for C4H4O?

Accepted Answer

A) C8H8O2 
B) C12H12O2 
C) C2H2O 
D) C8H8O 
A) C8H8O2 
B) C12H12O2 
C) C2H2O 
D) C8H8O

Question 8

Determine the name for Cl2O.

Accepted Answer

A) chlorine oxide 
B) dichlorine monoxide 
C) chlorine(I)oxide 
D) chlorine(II)oxide 
E) chlorate 
A) chlorine oxide 
B) dichlorine monoxide 
C) chlorine(I)oxide 
D) chlorine(II)oxide 
E) chlorate

Question 9

The chemical formula for lithium peroxide is

Accepted Answer

A) LiOH. 
B) LiO2. 
C) Li2O. 
D) Li2O2. 
A) LiOH. 
B) LiO2. 
C) Li2O. 
D) Li2O2.

Question 10

Which of the following is a molecular compound?

Accepted Answer

A) CuCl2 
B) N2O4 
C) NaNO3 
D) SrSO3 
E) RbBr 
A) CuCl2 
B) N2O4 
C) NaNO3 
D) SrSO3 
E) RbBr

Question 11

Identify an amine.

Accepted Answer

A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH 
A) CH3CH2OCH2CH3 
B) CH3CH2OH 
C) CH3CH2NH2 
D) CH3CH2CH2CH3 
E) CH3COOH

Question 12

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) Cr2(NO2) 
A) Cr(NO2)3 
B) Cr(NO3)3 
C) Cr(NO3)2 
D) Cr(NO2)2 
E) Cr2(NO2)

Question 13

How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g mol-1.

Accepted Answer

A) 1.23 × 1023 C atoms 
B) 2.96 × 1024 C atoms 
C) 2.87 × 1025 C atoms 
D) 1.10 × 1024 C atoms 
E) 3.68 × 1023 C atoms 
A) 1.23 × 1023 C atoms 
B) 2.96 × 1024 C atoms 
C) 2.87 × 1025 C atoms 
D) 1.10 × 1024 C atoms 
E) 3.68 × 1023 C atoms

Question 14

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

Accepted Answer

An ionic compound that contains a polyat

Question 15

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 
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 16

How many oxygen atoms are there in 7.00 g of sodium dichromate, Na2Cr2O7?

Accepted Answer

A) 0.187 oxygen atoms 
B) 2.30 × 1021 oxygen atoms 
C) 1.60 × 1022 oxygen atoms 
D) 1.13 × 1023 oxygen atoms 
A) 0.187 oxygen atoms 
B) 2.30 × 1021 oxygen atoms 
C) 1.60 × 1022 oxygen atoms 
D) 1.13 × 1023 oxygen atoms

Question 17

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

Accepted Answer

Atomic elements exist in natur

Question 18

Which of the following is the correct chemical formula for a molecule of astatine?

Accepted Answer

A) At 
B) At- 
C) At+ 
D) At2 
A) At 
B) At- 
C) At+ 
D) At2

Question 19

Determine the name for H2CO3.

Accepted Answer

A) carbonous acid 
B) dihydrogen carbonate 
C) carbonic acid 
D) hydrocarbonic acid 
E) hydrocarbide acid 
A) carbonous acid 
B) dihydrogen carbonate 
C) carbonic acid 
D) hydrocarbonic acid 
E) hydrocarbide acid

Question 20

Match the following.

-calcium

Accepted Answer

A) H(g) 
B) Ca2(s) 
C) I(s) 
D) Ne2(g) 
E) I2(s)
F)Ne(g)
G)Cl2(g)
H)Cl(g)
I)Ca(s)
J)H2(g)
K)O(g)
L)O2(g) 
A) H(g) 
B) Ca2(s) 
C) I(s) 
D) Ne2(g) 
E) I2(s)
F)Ne(g)
G)Cl2(g)
H)Cl(g)
I)Ca(s)
J)H2(g)
K)O(g)
L)O2(g)

Exam 3: Molecules, Compounds, and Nomenclature

The chemical formula for selenous acid is

Which one of the following contains 39% carbon by mass?

When forming ionic compounds, cations and anions form three-dimensional networks known as

Identify the formula for strontium nitride.

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

Which of the following is a formula for the compound disulfur tetrafluoride?

Which of the following is a possible molecular formula for C4H4O?

Determine the name for Cl2O.

The chemical formula for lithium peroxide is

Which of the following is a molecular compound?

Identify an amine.

Identify the formula for chromium(II)nitrate.

How many atoms of carbon are contained in 47.6 g of Al2(CO3)3? The molar mass of Al2(CO3)3 is 233.99 g mol-1.

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

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.

How many oxygen atoms are there in 7.00 g of sodium dichromate, Na2Cr2O7?

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

Which of the following is the correct chemical formula for a molecule of astatine?

Determine the name for H2CO3.

Match the following. -calcium

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallury

Transition Metals and Coordination Compounds

Filters

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

Which of the following is a possible molecular formula for C₄H₄O?

Determine the name for Cl₂O.

How many atoms of carbon are contained in 47.6 g of Al₂(CO₃)₃? The molar mass of Al₂(CO₃)₃is 233.99 g mol^-1.

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.

How many oxygen atoms are there in 7.00 g of sodium dichromate, Na₂Cr₂O₇?

Determine the name for H₂CO₃.