Question 1

The melting point of a certain solid is -27°C.This corresponds to

Accepted Answer

A)  9°F. 
B)  -33°F. 
C)  -17°F. 
D)  -106°F. 
E)  17°F. 
A)  9°F. 
B)  -33°F. 
C)  -17°F. 
D)  -106°F. 
E)  17°F.

Question 2

Calculate the mass of silver that occupies the same volume as 22.1 g of cobalt.The density of cobalt is 8.90 g/cm3 and the density of silver is 10.50 g/cm3.

Accepted Answer

A)  4.23 g 
B)  26.1 g 
C)  2 × 103 g 
D)  0.0534 g 
E)  0.236 g 
A)  4.23 g 
B)  26.1 g 
C)  2 × 103 g 
D)  0.0534 g 
E)  0.236 g

Question 3

As the standard deviation of an average of several measurements increases,_____.

Accepted Answer

A)  the accuracy of the measurement increases. 
B)  the precision of the measurement increases. 
C)  the accuracy and precision of the measurement decreases. 
D)  the accuracy of the measurement decreases. 
E)  the precision of the measurement decreases. 
A)  the accuracy of the measurement increases. 
B)  the precision of the measurement increases. 
C)  the accuracy and precision of the measurement decreases. 
D)  the accuracy of the measurement decreases. 
E)  the precision of the measurement decreases.

Question 4

Assuming a large number of measurements is used to calculate the average of measurements,slightly more than _____ of the values collected are expected to be within two standard deviations

Accepted Answer

A)  50% 
B)  68% 
C)  83% 
D)  95% 
E)  100% 
A)  50% 
B)  68% 
C)  83% 
D)  95% 
E)  100%

Question 5

Which of the following statements about dimensional analysis is true?

Accepted Answer

A)  It is a general problem-solving approach that uses the dimensions or units of each value to guide us through calculations. 
B)  It is a problem-solving approach that guides us through calculations without using conversion factors. 
C)  It is a method of calculation that uses graphs for deriving exact values. 
D)  It is a method of calculation that does not require the use of a conversion factor. 
E)  It is a problem-solving approach that takes into consideration the standard deviation values. 
A)  It is a general problem-solving approach that uses the dimensions or units of each value to guide us through calculations. 
B)  It is a problem-solving approach that guides us through calculations without using conversion factors. 
C)  It is a method of calculation that uses graphs for deriving exact values. 
D)  It is a method of calculation that does not require the use of a conversion factor. 
E)  It is a problem-solving approach that takes into consideration the standard deviation values.

Question 6

The wavelength of light emitted from a particular red diode laser is 651 nm.What is the wavelength in meters?

Accepted Answer

A)  6.51 × 1011 m 
B)  6.51 × 10-2 m 
C)  6.51 × 10-4 m 
D)  6.51 × 10-7 m 
E)  6.51 × 10-9 m 
A)  6.51 × 1011 m 
B)  6.51 × 10-2 m 
C)  6.51 × 10-4 m 
D)  6.51 × 10-7 m 
E)  6.51 × 10-9 m

Question 7

A car averages 26.5 miles per gallon of gasoline.How many liters of gasoline will be needed for a trip of 621 km? Some conversion factors that may be helpful are the following: 1 qt = 0.946 L 1 mile = 1.609 km 4 qt = 1 gal (exact)1 ft = 12 in (exact)

Accepted Answer

A)  6 × 101 L 
B)  7 × 103 L 
C)  3 × 103 L 
D)  1 × 102 L 
E)  4 × 104 L 
A)  6 × 101 L 
B)  7 × 103 L 
C)  3 × 103 L 
D)  1 × 102 L 
E)  4 × 104 L

Question 8

The speed of light in a vacuum is 3.00 × 108 m/s.What is the speed of light in units of kilometers per hour?

Accepted Answer

A)  1.20 × 10-2 km/hr 
B)  8.33 × 101 km/hr 
C)  8.33 × 107 km/hr 
D)  1.08 × 109 km/hr 
E)  1.08 × 1015 km/hr 
A)  1.20 × 10-2 km/hr 
B)  8.33 × 101 km/hr 
C)  8.33 × 107 km/hr 
D)  1.08 × 109 km/hr 
E)  1.08 × 1015 km/hr

Question 9

The melting point of a solid is 39 °F.This corresponds to _____.

Accepted Answer

A)  295 K 
B)  312 K 
C)  286 K 
D)  277 K 
E)  312 K. 
A)  295 K 
B)  312 K 
C)  286 K 
D)  277 K 
E)  312 K.

Question 10

Calculate the following:

Accepted Answer

A)  1 × 10-220 
B)  1 × 10540 
C)  1 × 10-740 
D)  1 × 10-940 
E)  1 × 10-420 
A)  1 × 10-220 
B)  1 × 10540 
C)  1 × 10-740 
D)  1 × 10-940 
E)  1 × 10-420

Question 11

Which of the following volumes are equivalent to 75 L? 1.75 cm3
2)7.5 × 104 mL
3)0.0075 kL

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1,2,and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1,2,and 3

Question 12

Which of the following is not a base SI unit?

Accepted Answer

A)  meter 
B)  kelvin 
C)  calorie 
D)  second 
E)  mole 
A)  meter 
B)  kelvin 
C)  calorie 
D)  second 
E)  mole

Question 13

How many nutritional calories are equivalent to 1150 kJ?

Accepted Answer

A)  0.10 Cal 
B)  1.15 Cal 
C)  275 Cal 
D)  4.8 × 103 Cal 
E)  3.6 × 10-3 Cal 
A)  0.10 Cal 
B)  1.15 Cal 
C)  275 Cal 
D)  4.8 × 103 Cal 
E)  3.6 × 10-3 Cal

Question 14

Express the result of the following calculation in scientific notation: 0.0573 cm2 ÷ 81.8 cm

Accepted Answer

A)  7 × 105 cm 
B)  7 × 104 cm 
C)  7 × 10-3 cm 
D)  7 × 10-4 cm 
E)  1 × 103 cm 
A)  7 × 105 cm 
B)  7 × 104 cm 
C)  7 × 10-3 cm 
D)  7 × 10-4 cm 
E)  1 × 103 cm

Question 15

Which of the following is the largest volume?

Accepted Answer

A)  5.0 × 102 cm3 
B)  5.0 × 10-4 L 
C)  5.0 × 103 mL 
D)  5.0 × 10-1 L 
E)  5.0 × 105 μL 
A)  5.0 × 102 cm3 
B)  5.0 × 10-4 L 
C)  5.0 × 103 mL 
D)  5.0 × 10-1 L 
E)  5.0 × 105 μL

Question 16

The SI unit for the diffusion coefficient is m2/s,but older texts sometimes report diffusion coefficients in units of in2/min.What is the value of a diffusion coefficient of 21.3 in2/min expressed in SI units? (2.54 cm = 1 in exactly)

Accepted Answer

A)  9.02 × 10-3 m2/s 
B)  3.25 × 105 m2/s 
C)  14.0 m2/s 
D)  5.50 × 102 m2/s 
E)  2.29 × 10-4 m2/s 
A)  9.02 × 10-3 m2/s 
B)  3.25 × 105 m2/s 
C)  14.0 m2/s 
D)  5.50 × 102 m2/s 
E)  2.29 × 10-4 m2/s

Question 17

A student uses a balance to determine the mass of an object as 5.719 grams.The correct mass of the object is 5.586 grams.What is the percent error in the student's mass determination?

Accepted Answer

A)  2.38% 
B)  0.133% 
C)  13.3% 
D)  74.3% 
E)  97.7% 
A)  2.38% 
B)  0.133% 
C)  13.3% 
D)  74.3% 
E)  97.7%

Question 18

Convert 42.12 cm3 to cubic inches (in3)given that 1 inch = 2.54 cm (exact).

Accepted Answer

A)  2.570 in3 
B)  16.580 in3 
C)  107.0 in3 
D)  690.200 in3 
E)  0.3890 in3 
A)  2.570 in3 
B)  16.580 in3 
C)  107.0 in3 
D)  690.200 in3 
E)  0.3890 in3

Question 19

The SI unit of temperature is the ____.

Accepted Answer

A)  kelvin 
B)  calorie 
C)  Fahrenheit 
D)  Ångstrom 
E)  kilocalorie 
A)  kelvin 
B)  calorie 
C)  Fahrenheit 
D)  Ångstrom 
E)  kilocalorie

Question 20

Which is the largest mass?

Accepted Answer

A)  10 dg 
B)  10 ng 
C)  10 mg 
D)  10 pg 
E)  10 cg 
A)  10 dg 
B)  10 ng 
C)  10 mg 
D)  10 pg 
E)  10 cg

Exam 2: Lets Review: The Tools of Quantitative Chemistry

The melting point of a certain solid is -27°C.This corresponds to

Calculate the mass of silver that occupies the same volume as 22.1 g of cobalt.The density of cobalt is 8.90 g/cm3 and the density of silver is 10.50 g/cm3.

As the standard deviation of an average of several measurements increases,_____.

Assuming a large number of measurements is used to calculate the average of measurements,slightly more than _____ of the values collected are expected to be within two standard deviations

Which of the following statements about dimensional analysis is true?

The wavelength of light emitted from a particular red diode laser is 651 nm.What is the wavelength in meters?

A car averages 26.5 miles per gallon of gasoline.How many liters of gasoline will be needed for a trip of 621 km? Some conversion factors that may be helpful are the following: 1 qt = 0.946 L 1 mile = 1.609 km 4 qt = 1 gal (exact)1 ft = 12 in (exact)

The speed of light in a vacuum is 3.00 × 108 m/s.What is the speed of light in units of kilometers per hour?

The melting point of a solid is 39 °F.This corresponds to _____.

Calculate the following:

Which of the following volumes are equivalent to 75 L? 1.75 cm3 2)7.5 × 104 mL 3)0.0075 kL

Which of the following is not a base SI unit?

How many nutritional calories are equivalent to 1150 kJ?

Express the result of the following calculation in scientific notation: 0.0573 cm2 ÷ 81.8 cm

Which of the following is the largest volume?

The SI unit for the diffusion coefficient is m2/s,but older texts sometimes report diffusion coefficients in units of in2/min.What is the value of a diffusion coefficient of 21.3 in2/min expressed in SI units? (2.54 cm = 1 in exactly)

A student uses a balance to determine the mass of an object as 5.719 grams.The correct mass of the object is 5.586 grams.What is the percent error in the student's mass determination?

Convert 42.12 cm3 to cubic inches (in3)given that 1 inch = 2.54 cm (exact).

The SI unit of temperature is the ____.

Which is the largest mass?

Basic Concepts of Chemistry

Atoms, molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Calculate the mass of silver that occupies the same volume as 22.1 g of cobalt.The density of cobalt is 8.90 g/cm³ and the density of silver is 10.50 g/cm³.

The speed of light in a vacuum is 3.00 × 10⁸ m/s.What is the speed of light in units of kilometers per hour?

Which of the following volumes are equivalent to 75 L? 1.75 cm³ 2)7.5 × 10⁴ mL 3)0.0075 kL

Express the result of the following calculation in scientific notation: 0.0573 cm² ÷ 81.8 cm

The SI unit for the diffusion coefficient is m²/s,but older texts sometimes report diffusion coefficients in units of in²/min.What is the value of a diffusion coefficient of 21.3 in²/min expressed in SI units? (2.54 cm = 1 in exactly)

Convert 42.12 cm³ to cubic inches (in³)given that 1 inch = 2.54 cm (exact).