Question 1

What is the empirical formula of a compound that is 62.0% C,10.4% H,and 27.5% O by mass?

Accepted Answer

A) C3HO 
B) C6HO3 
C) C6H12O2 
D) C5H10O2 
E) C3H6O 
A) C3HO 
B) C6HO3 
C) C6H12O2 
D) C5H10O2 
E) C3H6O

Question 2

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

Question 3

Determine the name for aqueous HBr.

Accepted Answer

A) bromic acid 
B) bromous acid 
C) hydrobromous acid 
D) hydrogen bromate 
E) hydrobromic acid 
A) bromic acid 
B) bromous acid 
C) hydrobromous acid 
D) hydrogen bromate 
E) hydrobromic acid

Question 4

Which of the following has the smallest mass?

Accepted Answer

A) 3.50 × 1023 molecules of I2 
B) 85.0 g of Cl2 
C) 2.50 mol of F2 
D) 0.050 kg of Br2 
A) 3.50 × 1023 molecules of I2 
B) 85.0 g of Cl2 
C) 2.50 mol of F2 
D) 0.050 kg of Br2

Question 5

You are given three solid compounds (A,B,C)with melting temperatures 700°C,150°C and 800°C respectively.Which of these is a molecular solid?

Accepted Answer

A) Solid A 
B) Solid B 
C) Solid C 
D) Solids A,B,C 
A) Solid A 
B) Solid B 
C) Solid C 
D) Solids A,B,C

Question 6

Determine the empirical formula for a compound that contains C,H and O.It contains 51.59% C and 35.30% O by mass.

Accepted Answer

A) C2H6O 
B) CHO 
C) C4H13O2 
D) CH4O3 
E) CH3O 
A) C2H6O 
B) CHO 
C) C4H13O2 
D) CH4O3 
E) CH3O

Question 7

Calculate the molar mass of C8H6O4.

Accepted Answer

A) 166.13 g/mol 
B) 182.09 g/mol 
C) 150.18 g/mol 
D) 172.13 g/mol 
A) 166.13 g/mol 
B) 182.09 g/mol 
C) 150.18 g/mol 
D) 172.13 g/mol

Question 8

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,I 
A) C,S,Pb 
B) K,Fe,Br 
C) Li,Na,K 
D) N,O,I

Question 9

Which of the following is an ionic compound?

Accepted Answer

A) LiCl 
B) NO2 
C) PCl3 
D) CF4 
E) SeBr2 
A) LiCl 
B) NO2 
C) PCl3 
D) CF4 
E) SeBr2

Question 10

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 40.0 g of calcium fluoride?

Accepted Answer

A) 2.27 g 
B) 7.70 g 
C) 15.0 g 
D) 20.5 g 
A) 2.27 g 
B) 7.70 g 
C) 15.0 g 
D) 20.5 g

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

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO2.

Accepted Answer

A) N2O3 
B) N3O6 
C) N2O4 
D) NO2 
E) N2O5 
A) N2O3 
B) N3O6 
C) N2O4 
D) NO2 
E) N2O5

Question 13

An aqueous solution of H2S is named

Accepted Answer

A) hydrosulfuric acid. 
B) hydrosulfurous acid. 
C) sulfuric acid. 
D) sulfurous acid. 
A) hydrosulfuric acid. 
B) hydrosulfurous acid. 
C) sulfuric acid. 
D) sulfurous acid.

Question 14

What type of bonding is found in the compound OF2?

Accepted Answer

A) covalent bonding 
B) hydrogen bonding 
C) ionic bonding 
D) metallic bonding 
A) covalent bonding 
B) hydrogen bonding 
C) ionic bonding 
D) metallic bonding

Question 15

What is the mass of 8.50 × 1022 molecules of NH3?

Accepted Answer

A) 0.00829 g 
B) 0.417 g 
C) 2.40 g 
D) 121 g 
A) 0.00829 g 
B) 0.417 g 
C) 2.40 g 
D) 121 g

Question 16

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 17

The ion,IO2-,is named

Accepted Answer

A) iodate ion. 
B) iodite ion. 
C) iodine dioxide ion. 
D) iodine(II)oxide ion. 
A) iodate ion. 
B) iodite ion. 
C) iodine dioxide ion. 
D) iodine(II)oxide ion.

Question 18

What is the coefficient for O2 when the equation is balance with smallest whole number coefficients?
_____ C4H10 + _____ O2 = _____ CO2 + _____ H2O

Accepted Answer

A) 13 
B) 6.5 
C) 1 
D) 26 
A) 13 
B) 6.5 
C) 1 
D) 26

Question 19

Write the name for Sr3(PO4)2.

Accepted Answer

A) strontium (III)phosphite 
B) strontium (II)phosphite 
C) strontium phosphate 
D) tristrontium phosphorustetraoxide 
E) strontium phosphite 
A) strontium (III)phosphite 
B) strontium (II)phosphite 
C) strontium phosphate 
D) tristrontium phosphorustetraoxide 
E) strontium phosphite

Question 20

Identify the formula for nitric acid.

Accepted Answer

A) HNO3 
B) HNO2 
C) HNO 
D) HNO4 
A) HNO3 
B) HNO2 
C) HNO 
D) HNO4

What is the empirical formula of a compound that is 62.0% C,10.4% H,and 27.5% O by mass?

Calculate the mass percent composition of lithium in Li₃PO₄.

Determine the name for aqueous HBr.

Which of the following has the smallest mass?

You are given three solid compounds (A,B,C)with melting temperatures 700^°C,150^°C and 800^°C respectively.Which of these is a molecular solid?

Determine the empirical formula for a compound that contains C,H and O.It contains 51.59% C and 35.30% O by mass.

Calculate the molar mass of C₈H₆O₄.

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

Which of the following is an ionic compound?

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 40.0 g of calcium fluoride?

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

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO₂.

An aqueous solution of H₂S is named

What type of bonding is found in the compound OF₂?

What is the mass of 8.50 × 10²² molecules of NH₃?

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

The ion,IO₂^-,is named

What is the coefficient for O₂ when the equation is balance with smallest whole number coefficients? ___ C₄H₁₀ + _ O₂ = _ CO₂ + ___ H₂O

Write the name for Sr₃(PO₄)₂.

Identify the formula for nitric acid.

Matter, Measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Exam 3: Molecules, Compounds and Chemical Equations

What is the empirical formula of a compound that is 62.0% C,10.4% H,and 27.5% O by mass?

Calculate the mass percent composition of lithium in Li3PO4.

Determine the name for aqueous HBr.

Which of the following has the smallest mass?

You are given three solid compounds (A,B,C)with melting temperatures 700°C,150°C and 800°C respectively.Which of these is a molecular solid?

Determine the empirical formula for a compound that contains C,H and O.It contains 51.59% C and 35.30% O by mass.

Calculate the molar mass of C8H6O4.

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

Which of the following is an ionic compound?

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 40.0 g of calcium fluoride?

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

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO2.

An aqueous solution of H2S is named

What type of bonding is found in the compound OF2?

What is the mass of 8.50 × 1022 molecules of NH3?

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

The ion,IO2-,is named

What is the coefficient for O2 when the equation is balance with smallest whole number coefficients? _____ C4H10 + _____ O2 = _____ CO2 + _____ H2O

Write the name for Sr3(PO4)2.

Identify the formula for nitric acid.

Matter, Measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Calculate the mass percent composition of lithium in Li₃PO₄.

You are given three solid compounds (A,B,C)with melting temperatures 700^°C,150^°C and 800^°C respectively.Which of these is a molecular solid?

Calculate the molar mass of C₈H₆O₄.

Determine the molecular formula of a compound that has a molar mass of 92.0 g/mol and an empirical formula of NO₂.

An aqueous solution of H₂S is named

What type of bonding is found in the compound OF₂?

What is the mass of 8.50 × 10²² molecules of NH₃?

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

The ion,IO₂^-,is named

What is the coefficient for O₂ when the equation is balance with smallest whole number coefficients? ___ C₄H₁₀ + _ O₂ = _ CO₂ + ___ H₂O

Write the name for Sr₃(PO₄)₂.