Question 1

How many atoms are in 12.8 g of copper metal?

Accepted Answer

A)  7.71 x 1024 atoms 
B)  1.21 x 1023 atoms 
C)  3.34 x 10-25 atoms 
A)  7.71 x 1024 atoms 
B)  1.21 x 1023 atoms 
C)  3.34 x 10-25 atoms B

Question 2

An unknown organic compound 0.315 g) containing only C, H, and O produces 0.771 of CO2 and 0.105 g of H2O when it undergoes complete combustion. The approximate molar mass is 108 g/mol. Which of the following compounds could be the identification of the unknown?

Accepted Answer

A)  para-Cresol, CH3C6H4OH) 
B)  Benzyl alcohol, C6H5CH2OH 
C)  1,2-Benzoquinone, C6H4O2 
A)  para-Cresol, CH3C6H4OH) 
B)  Benzyl alcohol, C6H5CH2OH 
C)  1,2-Benzoquinone, C6H4O2 C

Question 3

Which of the following compounds contains the largest number of atoms?

Accepted Answer

A)  1.00 mole of NH3 
B)  1.00 mole of H2SO4 
C)  1.00 mole of HBr 
A)  1.00 mole of NH3 
B)  1.00 mole of H2SO4 
C)  1.00 mole of HBr B

Question 4

What is the molar mass of K2CO3?

Accepted Answer

A)  138 g/mol 
B)  106 g/mol 
C)  99 g/mol 
A)  138 g/mol 
B)  106 g/mol 
C)  99 g/mol

Question 5

How is a liquid phase represented in a chemical reaction?

Accepted Answer

A)  s) 
B)  g) 
C)  l) 
A)  s) 
B)  g) 
C)  l)

Question 6

Which of the following compounds contains the largest number of atoms?

Accepted Answer

A)  1.00 mole of NH3 
B)  1.00 mole of H2SO4 
C)  1.00 mole of HBr 
A)  1.00 mole of NH3 
B)  1.00 mole of H2SO4 
C)  1.00 mole of HBr

Question 7

To dilute a HCl solution from 0.500 M to 0.100 M the final volume must be:

Accepted Answer

A)  1/5 the original volume 
B)  5 times the original volume 
C)  50 L 
A)  1/5 the original volume 
B)  5 times the original volume 
C)  50 L

Question 8

How many grams contain 1.45 x 1021 zinc atoms?

Accepted Answer

A)  1.57 x 10-1 g 
B)  5.71 x 1046 g 
C)  2.41 x 10-3 g 
A)  1.57 x 10-1 g 
B)  5.71 x 1046 g 
C)  2.41 x 10-3 g

Question 9

How many atoms can be found in a mole of mercury?

Accepted Answer

A)  201 atoms 
B)  6.02 x 1023 atoms 
C)  1.21 x 1026 atoms 
A)  201 atoms 
B)  6.02 x 1023 atoms 
C)  1.21 x 1026 atoms

Question 10

How is a gas phase represented in a chemical reaction?

Accepted Answer

A)  s) 
B)  g) 
C)  l) 
A)  s) 
B)  g) 
C)  l)

Question 11

What is the molar mass of potassium nitrate?

Accepted Answer

A)  85.10 g/mol 
B)  140.20 g/mol 
C)  101.10 g/mol 
A)  85.10 g/mol 
B)  140.20 g/mol 
C)  101.10 g/mol

Question 12

What is Avogadro's number?

Accepted Answer

A)  6.022 x 1023 particles/mole 
B)  6.022 x 1022 particles/mole 
C)  6.022 x 1024 particles/mole 
A)  6.022 x 1023 particles/mole 
B)  6.022 x 1022 particles/mole 
C)  6.022 x 1024 particles/mole

Question 13

How many moles are in 1.77 kg of cuprous sulfate?

Accepted Answer

A)  7.93 x 10-3 moles 
B)  7.93 moles 
C)  395 moles 
A)  7.93 x 10-3 moles 
B)  7.93 moles 
C)  395 moles

Question 14

What is the mass in grams of 1.59 moles of aluminum oxide?

Accepted Answer

A)  162 g 
B)  0.0156 g 
C)  64.1 g 
A)  162 g 
B)  0.0156 g 
C)  64.1 g

Question 15

If a hazardous bottle is labeled 20.2 percent by mass Hydrochloric Acid, HCl, with a density of 1.096 g/mL, calculate the molarity of the HCl solution.

Accepted Answer

A)  6.07 M 
B)  0.22 M 
C)  14.7 M 
A)  6.07 M 
B)  0.22 M 
C)  14.7 M

Question 16

What is the total number of atoms contained in 2.00 moles of iron?

Accepted Answer

A)  118 
B)  6.02 x 1023 
C)  1.2 x 1024 
A)  118 
B)  6.02 x 1023 
C)  1.2 x 1024

Question 17

How is a solid phase represented in a chemical reaction?

Accepted Answer

A)  s) 
B)  g) 
C)  l) 
A)  s) 
B)  g) 
C)  l)

Question 18

A 44.8 g rhodium sample contains how many rhodium atoms?

Accepted Answer

A)  2.62 x 1023 atoms 
B)  6.02 x 1023 atoms 
C)  2.70 x 1025 atoms 
A)  2.62 x 1023 atoms 
B)  6.02 x 1023 atoms 
C)  2.70 x 1025 atoms

Question 19

What is the concentration in ppm of a 3.7 L solution d = 1.00 g/mL) containing 4.21 x 10-7 kg of the pesticide DDT?

Accepted Answer

A)  1.14 x 10-1 ppm 
B)  1.14 x 102 ppm 
C)  1.14 x 101 ppm 
A)  1.14 x 10-1 ppm 
B)  1.14 x 102 ppm 
C)  1.14 x 101 ppm

Question 20

How many grams are in 1.02 x 1022 molecules of nitric acid?  Paired item 1)

Accepted Answer

A)  1.07 g 
B)  3720 g 
C)  2.69 x 10-4 g 
A)  1.07 g 
B)  3720 g 
C)  2.69 x 10-4 g

How many atoms are in 12.8 g of copper metal?

An unknown organic compound 0.315 g) containing only C, H, and O produces 0.771 of CO₂ and 0.105 g of H₂O when it undergoes complete combustion. The approximate molar mass is 108 g/mol. Which of the following compounds could be the identification of the unknown?

Which of the following compounds contains the largest number of atoms?

What is the molar mass of K₂CO₃?

How is a liquid phase represented in a chemical reaction?

Which of the following compounds contains the largest number of atoms?

To dilute a HCl solution from 0.500 M to 0.100 M the final volume must be:

How many grams contain 1.45 x 10²¹ zinc atoms?

How many atoms can be found in a mole of mercury?

How is a gas phase represented in a chemical reaction?

What is the molar mass of potassium nitrate?

What is Avogadro's number?

How many moles are in 1.77 kg of cuprous sulfate?

What is the mass in grams of 1.59 moles of aluminum oxide?

If a hazardous bottle is labeled 20.2 percent by mass Hydrochloric Acid, HCl, with a density of 1.096 g/mL, calculate the molarity of the HCl solution.

What is the total number of atoms contained in 2.00 moles of iron?

How is a solid phase represented in a chemical reaction?

A 44.8 g rhodium sample contains how many rhodium atoms?

What is the concentration in ppm of a 3.7 L solution d = 1.00 g/mL) containing 4.21 x 10^-7 kg of the pesticide DDT?

How many grams are in 1.02 x 10²² molecules of nitric acid? Paired item 1)

Essential Ideas

Atoms, Molecules, and Ions

Stoichiometry of Chemical Reactions

Thermochemistry

Electronic Structure and Periodic Properties of Elements

Chemical Bonding and Molecular Geometry

Advanced Theories of Covalent Bonding

Gases

Liquids and Solids

Solutions and Colloids

Kinetics

Fundamental Equilibrium Concepts

Acid-Base Equilibria

Thermodynamics

Electrochemistry

Representative Metals, Metalloids, and Nonmetals

Organic Chemistry

Nuclear Chemistry

Filters

Exam 3: Composition of Substances and Solutions

How many atoms are in 12.8 g of copper metal?

An unknown organic compound 0.315 g) containing only C, H, and O produces 0.771 of CO2 and 0.105 g of H2O when it undergoes complete combustion. The approximate molar mass is 108 g/mol. Which of the following compounds could be the identification of the unknown?

Which of the following compounds contains the largest number of atoms?

What is the molar mass of K2CO3?

How is a liquid phase represented in a chemical reaction?

Which of the following compounds contains the largest number of atoms?

To dilute a HCl solution from 0.500 M to 0.100 M the final volume must be:

How many grams contain 1.45 x 1021 zinc atoms?

How many atoms can be found in a mole of mercury?

How is a gas phase represented in a chemical reaction?

What is the molar mass of potassium nitrate?

What is Avogadro's number?

How many moles are in 1.77 kg of cuprous sulfate?

What is the mass in grams of 1.59 moles of aluminum oxide?

If a hazardous bottle is labeled 20.2 percent by mass Hydrochloric Acid, HCl, with a density of 1.096 g/mL, calculate the molarity of the HCl solution.

What is the total number of atoms contained in 2.00 moles of iron?

How is a solid phase represented in a chemical reaction?

A 44.8 g rhodium sample contains how many rhodium atoms?

What is the concentration in ppm of a 3.7 L solution d = 1.00 g/mL) containing 4.21 x 10-7 kg of the pesticide DDT?

How many grams are in 1.02 x 1022 molecules of nitric acid? Paired item 1)

Essential Ideas

Atoms, Molecules, and Ions

Stoichiometry of Chemical Reactions

Thermochemistry

Electronic Structure and Periodic Properties of Elements

Chemical Bonding and Molecular Geometry

Advanced Theories of Covalent Bonding

Gases

Liquids and Solids

Solutions and Colloids

Kinetics

Fundamental Equilibrium Concepts

Acid-Base Equilibria

Thermodynamics

Electrochemistry

Representative Metals, Metalloids, and Nonmetals

Organic Chemistry

Nuclear Chemistry

Filters

An unknown organic compound 0.315 g) containing only C, H, and O produces 0.771 of CO₂ and 0.105 g of H₂O when it undergoes complete combustion. The approximate molar mass is 108 g/mol. Which of the following compounds could be the identification of the unknown?

What is the molar mass of K₂CO₃?

How many grams contain 1.45 x 10²¹ zinc atoms?

What is the concentration in ppm of a 3.7 L solution d = 1.00 g/mL) containing 4.21 x 10^-7 kg of the pesticide DDT?

How many grams are in 1.02 x 10²² molecules of nitric acid? Paired item 1)