Question 1

_____ have replaced copper wires in long-distance communication as they are cheaper and less bulky than copper cables carrying the same information.

Accepted Answer

A) ​Aluminum wires 
B) ​Ethernet cables 
C) ​Optical fibers 
D) ​Semaphore lines 
E) ​Wireless antennas 
A) ​Aluminum wires 
B) ​Ethernet cables 
C) ​Optical fibers 
D) ​Semaphore lines 
E) ​Wireless antennas

Question 2

Convert 4523.0 g to mg.

Accepted Answer

A) 45.230 mg 
B) 452.30 mg 
C) 4.5230 × 106 mg 
D) 4.5230 × 103 mg 
E) 4.5230 mg 
A) 45.230 mg 
B) 452.30 mg 
C) 4.5230 × 106 mg 
D) 4.5230 × 103 mg 
E) 4.5230 mg

Question 3

The melting point of a particular solid is 2631 K.This corresponds to

Accepted Answer

A) 4276°F. 
B) 2904°C. 
C) 2297°C. 
D) 4212°F. 
E) 1342°F. 
A) 4276°F. 
B) 2904°C. 
C) 2297°C. 
D) 4212°F. 
E) 1342°F.

Question 4

Express the result of the following calculation in scientific notation: 503 cm × 355 cm

Accepted Answer

A) 17.9 × 104cm2 
B) 17.9 × 105cm2 
C) 2 × 104cm2 
D) 2 × 106cm2 
E) 2 × 105cm2 
A) 17.9 × 104cm2 
B) 17.9 × 105cm2 
C) 2 × 104cm2 
D) 2 × 106cm2 
E) 2 × 105cm2

Question 5

How many milligrams of ammonium nitrate are equivalent to 1.09 × 10-5 kg of ammonium nitrate?

Accepted Answer

A) 1.09 × 1010 
B) 1.09 × 104 
C) 1.09 × 107 
D) 1.09 × 10-7 
E) 1.09 × 101 
A) 1.09 × 1010 
B) 1.09 × 104 
C) 1.09 × 107 
D) 1.09 × 10-7 
E) 1.09 × 101

Question 6

Which of the following is an example of a chemical change?

Accepted Answer

A) alcohol evaporating 
B) water boiling 
C) skin burning in the sun 
D) iodine vaporizing 
E) ice melting 
A) alcohol evaporating 
B) water boiling 
C) skin burning in the sun 
D) iodine vaporizing 
E) ice melting

Question 7

Which of the following sequence of conversions will yield the correct number of scruples in 66.1 lb? Some equivalents that may be helpful are given below:
1)00 scruple = 20.0 grains
1)00 g = 15.4 grains
1)00 grain = 0.0648 g
1)00 lb = 453.6 g
1)00 kg = 2.205 lb

Accepted Answer

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

Question 8

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10-9 m.If the size of the particles that make up a particular material is 1.23 × 10-8 cm,what is this size in nanometers?

Accepted Answer

A) 12,300 nm 
B) 1.23 nm 
C) 0.123 nm 
D) 1230 nm 
E) 123 nm 
A) 12,300 nm 
B) 1.23 nm 
C) 0.123 nm 
D) 1230 nm 
E) 123 nm

Question 9

Which response has the correct number of significant figures and units for the following mathematical operation?

Accepted Answer

A) 1.804 × 10-5 J/cal 
B) 2 × 10-5 kcal 
C) 1.804 × 10-5 kcal 
D) 1.80 × 10-5 kcal 
E) 1.8 × 10-5 kcal 
A) 1.804 × 10-5 J/cal 
B) 2 × 10-5 kcal 
C) 1.804 × 10-5 kcal 
D) 1.80 × 10-5 kcal 
E) 1.8 × 10-5 kcal

Question 10

What is the correct answer to the following expression?
2)96 × 10-10 + 1.01 × 10-12

Accepted Answer

A) 2.9701 × 10-10 
B) 2.970 × 10-10 
C) 3 × 10-10 
D) 3.0 × 10-10 
E) 2.97 × 10-10 
A) 2.9701 × 10-10 
B) 2.970 × 10-10 
C) 3 × 10-10 
D) 3.0 × 10-10 
E) 2.97 × 10-10

Question 11

A piece of metal (mass = 18.300 g)is placed in 11.00 mL of chloroform (d = 1.498 g/mL)in a 25-mL graduated cylinder.The chloroform level increases to 15.46 mL.The best value for density of this metal from these data is

Accepted Answer

A) 1.18 g/mL. 
B) 2.74 g/mL. 
C) 4.103 g/mL. 
D) 6.15 g/mL. 
E) 4.10 g/mL. 
A) 1.18 g/mL. 
B) 2.74 g/mL. 
C) 4.103 g/mL. 
D) 6.15 g/mL. 
E) 4.10 g/mL.

Question 12

The daily dietary energy requirement for an adult is 2.00 × 103 kcal (1 cal = 4.184 J).This is equivalent to

Accepted Answer

A) 8.37 × 103 J. 
B) 8.37 × 103 kJ. 
C) 478 kJ. 
D) 2.00 × 103 kJ. 
E) 47.8 × 104 kJ. 
A) 8.37 × 103 J. 
B) 8.37 × 103 kJ. 
C) 478 kJ. 
D) 2.00 × 103 kJ. 
E) 47.8 × 104 kJ.

Question 13

The distance from St.Louis,Missouri,to Lincoln,Nebraska,is 444 miles by car.Which of the following series of calculations will yield this distance in units of kilometers?
(1 in = 2.54 cm (exact),1 mi = 5280 ft (exact),1 ft = 12 in (exact))

Accepted Answer

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

Question 14

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr2)

Accepted Answer

A) 51 cm2 
B) 51.022 cm2 
C) 51.02225 cm2 
D) 51.0222 cm2 
E) 51.02 cm2 
A) 51 cm2 
B) 51.022 cm2 
C) 51.02225 cm2 
D) 51.0222 cm2 
E) 51.02 cm2

Question 15

The melting point of nitrogen is 63 K.What is this temperature in degrees Celsius?

Accepted Answer

A) 63°C 
B) -336°C 
C) -63°C 
D) -210.°C 
E) 483°C 
A) 63°C 
B) -336°C 
C) -63°C 
D) -210.°C 
E) 483°C

Question 16

A hogshead is an old English unit of volume equal to 238.48 L.What is the volume of a cube with an edge length of 48.0 m expressed in units of hogshead? (1000 L = 1 m3)

Accepted Answer

A) 4.64 × 105 hogshead 
B) 4.64 × 102 hogshead 
C) 4.64 × 10-1 hogshead 
D) 2.64 × 1010 hogshead 
E) 2.64 × 104 hogshead 
A) 4.64 × 105 hogshead 
B) 4.64 × 102 hogshead 
C) 4.64 × 10-1 hogshead 
D) 2.64 × 1010 hogshead 
E) 2.64 × 104 hogshead

Question 17

A 0.391-kg sample of methylene chloride has a density of 1.326 g/cm3.Calculate its volume.

Accepted Answer

A) 3390 cm3 
B) 0.000295 cm3 
C) 391 cm3 
D) 295 cm3 
E) 518 cm3 
A) 3390 cm3 
B) 0.000295 cm3 
C) 391 cm3 
D) 295 cm3 
E) 518 cm3

Question 18

Which of the following is a mixture?

Accepted Answer

A) a homogeneous solution of sugar dissolved in water 
B) bromine (a liquid with the formula Br2) 
C) sucrose (table sugar: the formula is C12H22O11) 
D) graphite (an allotrope of carbon) 
E) calcium oxide (CaO or lime) 
A) a homogeneous solution of sugar dissolved in water 
B) bromine (a liquid with the formula Br2) 
C) sucrose (table sugar: the formula is C12H22O11) 
D) graphite (an allotrope of carbon) 
E) calcium oxide (CaO or lime)

Question 19

4.9 seconds contain this many picoseconds.

Accepted Answer

A) 4.9 × 109 
B) 4.9 × 1012 
C) 4.9 × 10-9 
D) 4.9 × 10-12 
E) 4.9 × 1015 
A) 4.9 × 109 
B) 4.9 × 1012 
C) 4.9 × 10-9 
D) 4.9 × 10-12 
E) 4.9 × 1015

Question 20

A lightyear is a unit of length equal to the distance that light travels in 1 year.What is 1 lightyear expressed in units of meters? The speed of light is 3.00 × 108 m/s.

Accepted Answer

A) ​9.51 × 100 m 
B) ​9.46 × 1015 m 
C) ​3.00 × 108 m 
D) ​1.05 × 10-1 m 
E) ​1.06 × 10-16 m 
A) ​9.51 × 100 m 
B) ​9.46 × 1015 m 
C) ​3.00 × 108 m 
D) ​1.05 × 10-1 m 
E) ​1.06 × 10-16 m

Exam 1: Chemistry and Measurement

_____ have replaced copper wires in long-distance communication as they are cheaper and less bulky than copper cables carrying the same information.

Convert 4523.0 g to mg.

The melting point of a particular solid is 2631 K.This corresponds to

Express the result of the following calculation in scientific notation: 503 cm × 355 cm

How many milligrams of ammonium nitrate are equivalent to 1.09 × 10-5 kg of ammonium nitrate?

Which of the following is an example of a chemical change?

Which of the following sequence of conversions will yield the correct number of scruples in 66.1 lb? Some equivalents that may be helpful are given below: 1)00 scruple = 20.0 grains 1)00 g = 15.4 grains 1)00 grain = 0.0648 g 1)00 lb = 453.6 g 1)00 kg = 2.205 lb

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10-9 m.If the size of the particles that make up a particular material is 1.23 × 10-8 cm,what is this size in nanometers?

Which response has the correct number of significant figures and units for the following mathematical operation?

What is the correct answer to the following expression? 2)96 × 10-10 + 1.01 × 10-12

A piece of metal (mass = 18.300 g)is placed in 11.00 mL of chloroform (d = 1.498 g/mL)in a 25-mL graduated cylinder.The chloroform level increases to 15.46 mL.The best value for density of this metal from these data is

The daily dietary energy requirement for an adult is 2.00 × 103 kcal (1 cal = 4.184 J).This is equivalent to

The distance from St.Louis,Missouri,to Lincoln,Nebraska,is 444 miles by car.Which of the following series of calculations will yield this distance in units of kilometers? (1 in = 2.54 cm (exact),1 mi = 5280 ft (exact),1 ft = 12 in (exact))

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr2)

The melting point of nitrogen is 63 K.What is this temperature in degrees Celsius?

A hogshead is an old English unit of volume equal to 238.48 L.What is the volume of a cube with an edge length of 48.0 m expressed in units of hogshead? (1000 L = 1 m3)

A 0.391-kg sample of methylene chloride has a density of 1.326 g/cm3.Calculate its volume.

Which of the following is a mixture?

4.9 seconds contain this many picoseconds.

A lightyear is a unit of length equal to the distance that light travels in 1 year.What is 1 lightyear expressed in units of meters? The speed of light is 3.00 × 108 m/s.

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

How many milligrams of ammonium nitrate are equivalent to 1.09 × 10^-5 kg of ammonium nitrate?

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10^-9 m.If the size of the particles that make up a particular material is 1.23 × 10^-8 cm,what is this size in nanometers?

What is the correct answer to the following expression? 2)96 × 10^-10 + 1.01 × 10^-12

The daily dietary energy requirement for an adult is 2.00 × 10³ kcal (1 cal = 4.184 J).This is equivalent to

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr²)

A hogshead is an old English unit of volume equal to 238.48 L.What is the volume of a cube with an edge length of 48.0 m expressed in units of hogshead? (1000 L = 1 m³)

A 0.391-kg sample of methylene chloride has a density of 1.326 g/cm³.Calculate its volume.

A lightyear is a unit of length equal to the distance that light travels in 1 year.What is 1 lightyear expressed in units of meters? The speed of light is 3.00 × 10⁸ m/s.