Question 1

The number of significant figures in 7.3748 × 10-1 dm is

Accepted Answer

A) 5. 
B) 6. 
C) 3. 
D) 7. 
E) 4. 
A) 5. 
B) 6. 
C) 3. 
D) 7. 
E) 4.

Question 2

A barleycorn is an English unit of length equal to 1/3 of an inch.What is the height of the Empire State Building (449 m)expressed in barleycorn? (2.54 cm = 1 in)

Accepted Answer

A) 3 × 105 barleycorn 
B) 6 × 103 barleycorn 
C) 5 × 104 barleycorn 
D) 4 × 104 barleycorn 
E) 6 × 10-1 barleycorn 
A) 3 × 105 barleycorn 
B) 6 × 103 barleycorn 
C) 5 × 104 barleycorn 
D) 4 × 104 barleycorn 
E) 6 × 10-1 barleycorn

Question 3

A particular sheet of paper measures 8.5 × 6.5 inches.What is the surface area of one side of the paper in cm2? (2.54 cm = 1 in exactly)

Accepted Answer

A) 1 × 102 cm2 
B) 6 × 101 cm2 
C) 4 × 102 cm2 
D) 2 × 101 cm2 
E) 8.6 cm2 
A) 1 × 102 cm2 
B) 6 × 101 cm2 
C) 4 × 102 cm2 
D) 2 × 101 cm2 
E) 8.6 cm2

Question 4

Which is the largest mass?

Accepted Answer

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

Question 5

The state of matter for an object that has a definite volume but not a definite shape is the

Accepted Answer

A) elemental state. 
B) gaseous state. 
C) mixed state. 
D) liquid state. 
E) solid state. 
A) elemental state. 
B) gaseous state. 
C) mixed state. 
D) liquid state. 
E) solid state.

Question 6

Four cubes of equal mass are made of lead (density = 11.3 g/cm3),silver (10.5 g/cm3),iron (7.90 g/cm3),and aluminum (2.70 g/cm3).Which cube has the longest edge?

Accepted Answer

A) lead 
B) iron 
C) silver 
D) all four cubes have the same length edge 
E) aluminum 
A) lead 
B) iron 
C) silver 
D) all four cubes have the same length edge 
E) aluminum

Question 7

What is the best answer to the following expression?
(59)54 cm + 0.773 cm + 4.7403 cm - 53.1 cm)

Accepted Answer

A) 12 cm 
B) 11.9533 cm 
C) 11.953 cm 
D) 11.95 cm 
E) 12.0 cm 
A) 12 cm 
B) 11.9533 cm 
C) 11.953 cm 
D) 11.95 cm 
E) 12.0 cm

Question 8

Convert 12.36 cm3 to cubic inches (in3)given that 1 inch = 2.54 cm (exact).

Accepted Answer

A) 0.754 in3 
B) 4.865 in3 
C) 31.390 in3 
D) 202.500 in3 
E) 1.325 in3 
A) 0.754 in3 
B) 4.865 in3 
C) 31.390 in3 
D) 202.500 in3 
E) 1.325 in3

Question 9

What is the mass of H2SO4 in a 41.8-cm3 sample of sulfuric acid that has a density of 1.49 g/cm3 and consists of 51.9% H2SO4?

Accepted Answer

A) 120 g 
B) 62.3 g 
C) 14.6 g 
D) 1.85 g 
E) 32.3 g 
A) 120 g 
B) 62.3 g 
C) 14.6 g 
D) 1.85 g 
E) 32.3 g

Question 10

Express the number 0.000114 in scientific notation.

Accepted Answer

A) ​0.114 × 10-3 
B) 1.14 ​× 104 
C) 1.14 ​× 102 
D) ​1.14 × 10-4 
E) 114 ​× 10-6 
A) ​0.114 × 10-3 
B) 1.14 ​× 104 
C) 1.14 ​× 102 
D) ​1.14 × 10-4 
E) 114 ​× 10-6

Question 11

The melting point and the normal boiling point of water can be used to calibrate thermometers.What are these respective temperatures in kelvins?

Accepted Answer

A) 273 and 373 
B) 32 and 212 
C) 100 and 273 
D) 0 and 100 
E) 0 and 373 
A) 273 and 373 
B) 32 and 212 
C) 100 and 273 
D) 0 and 100 
E) 0 and 373

Question 12

How many significant figures are there in the number 0.04560700?

Accepted Answer

A) 4 
B) 9 
C) 8 
D) 5 
E) 7 
A) 4 
B) 9 
C) 8 
D) 5 
E) 7

Question 13

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 18.5 in2/min expressed in SI units? (2.54 cm = 1 in exactly)

Accepted Answer

A) 7.83 × 10-3 m2/s 
B) 2.82 × 105 m2/s 
C) 12.100 m2/s 
D) 4.78 × 102 m2/s 
E) 1.99 × 10-4 m2/s 
A) 7.83 × 10-3 m2/s 
B) 2.82 × 105 m2/s 
C) 12.100 m2/s 
D) 4.78 × 102 m2/s 
E) 1.99 × 10-4 m2/s

Question 14

An untested explanation of a series of experimental observations is called _____.

Accepted Answer

A) a hypothesis 
B) a theory 
C) a law 
D) an experiment 
E) the scientific method 
A) a hypothesis 
B) a theory 
C) a law 
D) an experiment 
E) the scientific method

Question 15

What is the best answer to the following expression involving a sum of measurements?
(52)706 cm + 0.734 cm + 14.4 cm)

Accepted Answer

A) 68 cm 
B) 67.8400 cm 
C) 67.84 cm 
D) 67.840 cm 
E) 67.8 cm 
A) 68 cm 
B) 67.8400 cm 
C) 67.84 cm 
D) 67.840 cm 
E) 67.8 cm

Question 16

A student is working on converting a number that has a unit with the SI prefix milli- to a unit that has the prefix mega-.Using your knowledge about the relative sizes that milli- and mega- represent,how should the student convert the number?

Accepted Answer

A) The student should multiply the number by 109. 
B) The student should multiply the number by 106. 
C) The student should divide the number by 106. 
D) The student should use the number as is. 
E) The student should divide the number by 109. 
A) The student should multiply the number by 109. 
B) The student should multiply the number by 106. 
C) The student should divide the number by 106. 
D) The student should use the number as is. 
E) The student should divide the number by 109.

Question 17

A sample of milk is found to have arsenic at a concentration of 3.76 μg/L.What is the concentration in ounces per gallon?
1 qt = 946.4 mL
1 gal = 4 qt
16 oz = 1 lb
1 lb = 0.4536 kg

Accepted Answer

A) 2.82 × 103 oz/gal 
B) 5.02 × 10-7 oz/gal 
C) 2.59 oz/gal 
D) 4.04 × 10-4 oz/gal 
E) 3.50 × 10-8 oz/gal 
A) 2.82 × 103 oz/gal 
B) 5.02 × 10-7 oz/gal 
C) 2.59 oz/gal 
D) 4.04 × 10-4 oz/gal 
E) 3.50 × 10-8 oz/gal

Question 18

The density of a particular solid is 4.51 g/cm3 at 25°C.What is its density in kilograms per cubic meter (kg/m3)?

Accepted Answer

A) 4.51 × 1010 
B) 4.51 × 101 
C) 4.51 × 10-2 
D) 4.51 × 103 
E) 4.51 × 107 
A) 4.51 × 1010 
B) 4.51 × 101 
C) 4.51 × 10-2 
D) 4.51 × 103 
E) 4.51 × 107

Question 19

A sample of cesium carbonate,weighing 3.80 g,requires 1.90 g of hydrogen bromide gas to completely decompose to water,cesium bromide,and carbon dioxide gas.The total mass of water and cesium bromide formed is 5.20 g and no hydrogen bromide or cesium carbonate remains.According to the law of conservation of mass,what mass of carbon dioxide must have been formed?

Accepted Answer

A) 0.50 g 
B) 1.40 g 
C) 5.49 g 
D) 10.90 g 
E) 1.90 g 
A) 0.50 g 
B) 1.40 g 
C) 5.49 g 
D) 10.90 g 
E) 1.90 g

Question 20

The average speed of oxygen molecules at 690°C is 1.60 × 105 cm/s.Which of the following calculations would convert this speed to units of miles per hour?

Accepted Answer

A) ​   
B)    
C) ​   
D)    
E)    
A) ​   
B)    
C) ​   
D)    
E)

Exam 1: Chemistry and Measurement

The number of significant figures in 7.3748 × 10-1 dm is

A barleycorn is an English unit of length equal to 1/3 of an inch.What is the height of the Empire State Building (449 m)expressed in barleycorn? (2.54 cm = 1 in)

A particular sheet of paper measures 8.5 × 6.5 inches.What is the surface area of one side of the paper in cm2? (2.54 cm = 1 in exactly)

Which is the largest mass?

The state of matter for an object that has a definite volume but not a definite shape is the

Four cubes of equal mass are made of lead (density = 11.3 g/cm3),silver (10.5 g/cm3),iron (7.90 g/cm3),and aluminum (2.70 g/cm3).Which cube has the longest edge?

What is the best answer to the following expression? (59)54 cm + 0.773 cm + 4.7403 cm - 53.1 cm)

Convert 12.36 cm3 to cubic inches (in3)given that 1 inch = 2.54 cm (exact).

What is the mass of H2SO4 in a 41.8-cm3 sample of sulfuric acid that has a density of 1.49 g/cm3 and consists of 51.9% H2SO4?

Express the number 0.000114 in scientific notation.

The melting point and the normal boiling point of water can be used to calibrate thermometers.What are these respective temperatures in kelvins?

How many significant figures are there in the number 0.04560700?

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 18.5 in2/min expressed in SI units? (2.54 cm = 1 in exactly)

An untested explanation of a series of experimental observations is called _____.

What is the best answer to the following expression involving a sum of measurements? (52)706 cm + 0.734 cm + 14.4 cm)

A student is working on converting a number that has a unit with the SI prefix milli- to a unit that has the prefix mega-.Using your knowledge about the relative sizes that milli- and mega- represent,how should the student convert the number?

A sample of milk is found to have arsenic at a concentration of 3.76 μg/L.What is the concentration in ounces per gallon? 1 qt = 946.4 mL 1 gal = 4 qt 16 oz = 1 lb 1 lb = 0.4536 kg

The density of a particular solid is 4.51 g/cm3 at 25°C.What is its density in kilograms per cubic meter (kg/m3)?

The average speed of oxygen molecules at 690°C is 1.60 × 105 cm/s.Which of the following calculations would convert this speed to units of miles per hour?

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

The number of significant figures in 7.3748 × 10^-1 dm is

A particular sheet of paper measures 8.5 × 6.5 inches.What is the surface area of one side of the paper in cm²? (2.54 cm = 1 in exactly)

Four cubes of equal mass are made of lead (density = 11.3 g/cm³),silver (10.5 g/cm³),iron (7.90 g/cm³),and aluminum (2.70 g/cm³).Which cube has the longest edge?

Convert 12.36 cm³ to cubic inches (in³)given that 1 inch = 2.54 cm (exact).

What is the mass of H₂SO₄ in a 41.8-cm³ sample of sulfuric acid that has a density of 1.49 g/cm³ and consists of 51.9% H₂SO₄?

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 18.5 in²/min expressed in SI units? (2.54 cm = 1 in exactly)

The density of a particular solid is 4.51 g/cm³ at 25°C.What is its density in kilograms per cubic meter (kg/m³)?

The average speed of oxygen molecules at 690°C is 1.60 × 10⁵ cm/s.Which of the following calculations would convert this speed to units of miles per hour?