Question 1

Define the law of the conservation of energy.

Accepted Answer

Energy is neither cr

Question 2

If a truck gets 13.5 miles per gallon (mpg)fuel efficiency,calculate the fuel efficiency in litres per 100 km.(1 US gal = 3.78541 L; 1 mile = 1609.34 m)

Accepted Answer

A) 8.19 L (100 km)-1 
B) 12.9 L (100 km)-1 
C) 17.4 L (100 km)-1 
D) 21.3 L (100 km)-1 
E) 24.7 L (100 km)-1 
A) 8.19 L (100 km)-1 
B) 12.9 L (100 km)-1 
C) 17.4 L (100 km)-1 
D) 21.3 L (100 km)-1 
E) 24.7 L (100 km)-1

Question 3

The factor 10-3 corresponds to which prefix?

Accepted Answer

A) deka 
B) deci 
C) milli 
D) centi 
A) deka 
B) deci 
C) milli 
D) centi

Question 4

How many significant figures are there in the answer to the following problem? (9.992 × 3.200)+ 0.610

Accepted Answer

A) one 
B) two 
C) three 
D) four 
A) one 
B) two 
C) three 
D) four

Question 5

Convert 10 cm3 to m3.

Accepted Answer

A) 1 × 10-5 m3 
B) 1 × 10-1 m3 
C) 1 × 103 m3 
D) 1 × 107 m3 
A) 1 × 10-5 m3 
B) 1 × 10-1 m3 
C) 1 × 103 m3 
D) 1 × 107 m3

Question 6

If the temperature is 178 °F,what is the temperature in degrees Celsius?

Accepted Answer

A) 352 °C 
B) 451 °C 
C) 67 °C 
D) 81.1 °C 
E) 378 °C 
A) 352 °C 
B) 451 °C 
C) 67 °C 
D) 81.1 °C 
E) 378 °C

Question 7

What decimal power does the abbreviation n represent?

Accepted Answer

A) 1 × 1015 
B) 1 × 102 
C) 1 × 10-1 
D) 1 × 10-9 
E) 1 × 10-12 
A) 1 × 1015 
B) 1 × 102 
C) 1 × 10-1 
D) 1 × 10-9 
E) 1 × 10-12

Question 8

Gasoline is an example of

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture.

Question 9

Mole is a measure of

Accepted Answer

A) luminous intensity. 
B) amount. 
C) mass. 
D) length. 
E) current. 
A) luminous intensity. 
B) amount. 
C) mass. 
D) length. 
E) current.

Question 10

Kelvin is a measure of

Accepted Answer

A) mass. 
B) time. 
C) temperature. 
D) length. 
E) volume. 
A) mass. 
B) time. 
C) temperature. 
D) length. 
E) volume.

Question 11

Gold is an example of

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture.

Question 12

A physical change

Accepted Answer

A) occurs when iron rusts. 
B) occurs when sugar is heated into caramel. 
C) occurs when glucose is converted into energy within your cells. 
D) occurs when water is evaporated. 
E) occurs when propane is burned for heat. 
A) occurs when iron rusts. 
B) occurs when sugar is heated into caramel. 
C) occurs when glucose is converted into energy within your cells. 
D) occurs when water is evaporated. 
E) occurs when propane is burned for heat.

Question 13

A flash drive contains 4 gigabytes.How many bytes does it contain?

Accepted Answer

4 000 000 000 bytes,

Question 14

If a room requires 25.4 square yards of carpeting,what is the area of the floor in units of ft2? (3 ft = 1 yd)

Accepted Answer

A) 76.2 ft2 
B) 8.47 ft2 
C) 282 ft2 
D) 229 ft2 
E) 68.6 ft2 
A) 76.2 ft2 
B) 8.47 ft2 
C) 282 ft2 
D) 229 ft2 
E) 68.6 ft2

Question 15

Identify the unit of measurement that is a SI base unit of measurement.

Accepted Answer

A) second 
B) Celsius 
C) cup 
D) pound 
E) yard 
A) second 
B) Celsius 
C) cup 
D) pound 
E) yard

Question 16

What answer should be reported,with the correct number of significant figures,for the following calculation? 
100.0 g × 4.18 J g-1 °C-1 × (26.4 °C - 25.5 °C)

Accepted Answer

A) 4 × 102 J 
B) 3.8 × 102 J 
C) 376 J 
D) 376.2 J 
E) 376.20 J 
A) 4 × 102 J 
B) 3.8 × 102 J 
C) 376 J 
D) 376.2 J 
E) 376.20 J

Question 17

Choose the homogeneous mixture from the list below.

Accepted Answer

A) lemonade 
B) mud 
C) ice water 
D) salad dressing 
E) salsa 
A) lemonade 
B) mud 
C) ice water 
D) salad dressing 
E) salsa

Question 18

How many litres of air are in a room that measures $11.0 \mathrm { ft } \times 12.0 \mathrm { ft }$ and has an 7.00 ft ceiling? $\left( 1 \mathrm { in } . = 2.54 \mathrm {~cm} \left( \text { exactly); } 1 \mathrm {~L} = 10 ^ { 3 } \mathrm {~cm} ^ { 3 } \right) \right.$

Accepted Answer

A) 2.62 × $10 ^ { 4 }$ 
B) 2347.0 
C) 28.2 
D) 2.82 × $10 ^ { 7 }$ 
E) 9.24 × $10 ^ { 5 }$ 
A) 2.62 × $10 ^ { 4 }$ 
B) 2347.0 
C) 28.2 
D) 2.82 × $10 ^ { 7 }$ 
E) 9.24 × $10 ^ { 5 }$

Question 19

What answer should be reported,with the correct number of significant figures,for the following calculation? 
6.83192458 + log(6.7831 × 104)

Accepted Answer

A) 11.66335 
B) 11.663353 
C) 11.6634 
D) 11.6633528 
E) 11.663 
A) 11.66335 
B) 11.663353 
C) 11.6634 
D) 11.6633528 
E) 11.663

Question 20

How many cubic metres (m3)are in 240 cubic feet? (1 m = 3.28084 feet)

Accepted Answer

A) 73.2 m3 
B) 12.7 m3 
C) 22.3 m3 
D) 6.80 m3 
E) 2.08 m3 
A) 73.2 m3 
B) 12.7 m3 
C) 22.3 m3 
D) 6.80 m3 
E) 2.08 m3

Exam 1: Units of Measurement for Physical and Chemical Change

Define the law of the conservation of energy.

If a truck gets 13.5 miles per gallon (mpg)fuel efficiency,calculate the fuel efficiency in litres per 100 km.(1 US gal = 3.78541 L; 1 mile = 1609.34 m)

The factor 10-3 corresponds to which prefix?

How many significant figures are there in the answer to the following problem? (9.992 × 3.200)+ 0.610

Convert 10 cm3 to m3.

If the temperature is 178 °F,what is the temperature in degrees Celsius?

What decimal power does the abbreviation n represent?

Gasoline is an example of

Mole is a measure of

Kelvin is a measure of

Gold is an example of

A physical change

A flash drive contains 4 gigabytes.How many bytes does it contain?

If a room requires 25.4 square yards of carpeting,what is the area of the floor in units of ft2? (3 ft = 1 yd)

Identify the unit of measurement that is a SI base unit of measurement.

What answer should be reported,with the correct number of significant figures,for the following calculation? 100.0 g × 4.18 J g-1 °C-1 × (26.4 °C - 25.5 °C)

Choose the homogeneous mixture from the list below.

What answer should be reported,with the correct number of significant figures,for the following calculation? 6.83192458 + log(6.7831 × 104)

How many cubic metres (m3)are in 240 cubic feet? (1 m = 3.28084 feet)

Atoms and Elements

Molecules,compounds,and Nomenclature

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 Metallurgy

Transition Metals and Coordination Compounds

Filters

The factor 10^-3 corresponds to which prefix?

Convert 10 cm³ to m³.

If a room requires 25.4 square yards of carpeting,what is the area of the floor in units of ft²? (3 ft = 1 yd)

What answer should be reported,with the correct number of significant figures,for the following calculation? 100.0 g × 4.18 J g^-1°C^-1 × (26.4 °C - 25.5 °C)

What answer should be reported,with the correct number of significant figures,for the following calculation? 6.83192458 + log(6.7831 × 10⁴)

How many cubic metres (m³)are in 240 cubic feet? (1 m = 3.28084 feet)