Question 1

A comfortable temperature for bath water is 95 ° F. What temperature is this on the Kelvin scale?

Accepted Answer

A)  - 238 K 
B)  35 K 
C)  171 K 
D)  308 K 
E)  476 K 
A)  - 238 K 
B)  35 K 
C)  171 K 
D)  308 K 
E)  476 K

Question 2

How many gallons are present in 43.7 Liters?
(1 gallon = 4 quarts and 1 quart = 0.946 L)

Accepted Answer

A)  10.3 gallons 
B)  11.5 gallons 
C)  46.2 gallons 
D)  165 gallons 
E)  185 gallons 
A)  10.3 gallons 
B)  11.5 gallons 
C)  46.2 gallons 
D)  165 gallons 
E)  185 gallons

Question 3

Exhibit 1-1 Consider the following figure that is a blow-up view of a region of a 50 mL burette to answer the following question(s).   The density of ethanol was measured in two steps. The first step involved measuring its volume using a burette. The mass of this volume was then measured.
-Refer to Exhibit 1-1. In the reported measurement above for the volume of the ethanol displaced from the burette (given in milliliters), what digit is the digit of uncertainty ?

Accepted Answer

A)  the hundredths place (0.01) 
B)  the tenths place (0.1) 
C)  the ones place (1) 
D)  the tens place (10) 
E)  All digits are reported with certainty. 
A)  the hundredths place (0.01) 
B)  the tenths place (0.1) 
C)  the ones place (1) 
D)  the tens place (10) 
E)  All digits are reported with certainty.

Question 4

An accurate measurement

Accepted Answer

A)  is known to two or more significant figures. 
B)  is known to two or more decimal places. 
C)  is repeatable. 
D)  is close to the correct answer 
E)  is beyond the scope of a first year chemistry student. 
A)  is known to two or more significant figures. 
B)  is known to two or more decimal places. 
C)  is repeatable. 
D)  is close to the correct answer 
E)  is beyond the scope of a first year chemistry student.

Question 5

Choose the best answer to the following math problem ( with the proper number of significant digits and rounded correctly ). (12.3432 - 8.84)×22.48 = ??

Accepted Answer

A)  78.751936 
B)  78.75 
C)  78.76 
D)  78.8 
E)  78.752 
A)  78.751936 
B)  78.75 
C)  78.76 
D)  78.8 
E)  78.752

Question 6

How many micrometers, m m, are present in 0.575 mm?

Accepted Answer

A)  5.75×10 - 10 m m 
B)  5.75×10 - 4 m m 
C)  5.75×101 m m 
D)  5.75×102 m m 
E)  5.75×108 m m 
A)  5.75×10 - 10 m m 
B)  5.75×10 - 4 m m 
C)  5.75×101 m m 
D)  5.75×102 m m 
E)  5.75×108 m m

Question 7

What is the density of mercury when reported to the proper number of significant digits and in scientific notation if a sample is found to have a mass of 524.5 g and occupies a volume of 38.72 ml?

Accepted Answer

A)  7.38×10 - 2 g/mL 
B)  7.382×10 - 2 g/mL 
C)  1.35×101 g/mL 
D)  1.354×101 g/mL 
E)  1.355×101 g/mL 
A)  7.38×10 - 2 g/mL 
B)  7.382×10 - 2 g/mL 
C)  1.35×101 g/mL 
D)  1.354×101 g/mL 
E)  1.355×101 g/mL

Question 8

Which measurements below have four significant digits?
Measurement
I. 0.023 mL
II. 2300 mL
III. 1700 . mL
IV. 0.004050 mL

Accepted Answer

A)  all of these have four significant digits 
B)  I, II and III 
C)  II, III, and IV 
D)  I and II 
E)  III and IV 
A)  all of these have four significant digits 
B)  I, II and III 
C)  II, III, and IV 
D)  I and II 
E)  III and IV

Question 9

A compound is:

Accepted Answer

A)  a pure substance that can be decomposed chemically. 
B)  a characteristic that describes a substance. 
C)  a pure substance that cannot be decomposed chemically. 
D)  a combination of atoms. 
E)  none of these. 
A)  a pure substance that can be decomposed chemically. 
B)  a characteristic that describes a substance. 
C)  a pure substance that cannot be decomposed chemically. 
D)  a combination of atoms. 
E)  none of these.

Question 10

Which form of substances listed below cannot be separated into simpler substances by chemical or physical means?

Accepted Answer

A)  an element 
B)  a compound 
C)  a heterogeneous mixture 
D)  a homogeneous mixture 
E)  All substances can be separated into simpler substances. 
A)  an element 
B)  a compound 
C)  a heterogeneous mixture 
D)  a homogeneous mixture 
E)  All substances can be separated into simpler substances.

Question 11

A precise measurement

Accepted Answer

A)  is known to two or more significant figures. 
B)  is known to two or more decimal places. 
C)  is repeatable. 
D)  is close to the correct answer 
E)  is beyond the scope of a first-year chemistry student. 
A)  is known to two or more significant figures. 
B)  is known to two or more decimal places. 
C)  is repeatable. 
D)  is close to the correct answer 
E)  is beyond the scope of a first-year chemistry student.

Question 12

Which of the following is not an element?

Accepted Answer

A)  niobium 
B)  thallium 
C)  silicon 
D)  sodium 
E)  ammonium 
A)  niobium 
B)  thallium 
C)  silicon 
D)  sodium 
E)  ammonium

Question 13

What volume of gold has a mass of 25.0 grams?
(Density of gold = 19.30 g/mL)

Accepted Answer

A)  2.07×10 - 3 mL 
B)  0.772 mL 
C)  1.30 mL 
D)  25.0 mL 
E)  482 mL 
A)  2.07×10 - 3 mL 
B)  0.772 mL 
C)  1.30 mL 
D)  25.0 mL 
E)  482 mL

Question 14

The definition "stable pure substance that cannot be separated into simpler substances by chemical means" would best fit which term listed below?

Accepted Answer

A)  element 
B)  compound 
C)  atom 
D)  molecule 
E)  xanon 
A)  element 
B)  compound 
C)  atom 
D)  molecule 
E)  xanon

Question 15

The dimensions of the following cube were measured. What would be the volume of this cube expressed to the proper number of significant digits?
(Volume = l w d )

Accepted Answer

A)  29.127861 cm3 
B)  29.13 cm3 
C)  29.1 cm3 
D)  29. cm3 
E)  30 cm3 
A)  29.127861 cm3 
B)  29.13 cm3 
C)  29.1 cm3 
D)  29. cm3 
E)  30 cm3

Question 16

Of the three properties listed below, which ones are intensive properties?
I. mass
II. density
III. color

Accepted Answer

A)  I and II 
B)  II and III 
C)  II only 
D)  I only 
E)  I, II, and III 
A)  I and II 
B)  II and III 
C)  II only 
D)  I only 
E)  I, II, and III

Question 17

"A 33 g sample of red liquid at its freezing point of 260 K had a density of 0.926 g/mL." Which of the properties given in the previous statement is extensive ?

Accepted Answer

A)  33 g 
B)  red 
C)  freezing point 
D)  260 K 
E)  0.926 g/mL 
A)  33 g 
B)  red 
C)  freezing point 
D)  260 K 
E)  0.926 g/mL

Question 18

Which of the following matched pairs of elemental names and chemical symbols is properly labeled?
I. Calcium, C
II. Plutonium, Pt
III. Silicon, Si
IV. Iron, I
V. Nitrogen, N

Accepted Answer

A)  I, IV and V 
B)  II, III and V 
C)  I, III, IV and V 
D)  III and V 
E)  All are properly labeled 
A)  I, IV and V 
B)  II, III and V 
C)  I, III, IV and V 
D)  III and V 
E)  All are properly labeled

Question 19

Convert 26 ° C to kelvins.

Accepted Answer

A)  288 K 
B)  321 K 
C)  204 K 
D)  299 K 
E)  53.3 K 
A)  288 K 
B)  321 K 
C)  204 K 
D)  299 K 
E)  53.3 K

Question 20

The area of a telescope lens is 5773 mm2. What is this area given in square feet, ft2?
(1 inch = 2.54 cm)

Accepted Answer

A)  6.214×10 - 2 ft2 
B)  8.948 ft2 
C)  1.894×101 ft2 
D)  1.288×103 ft2 
E)  5.363×104 ft2 
A)  6.214×10 - 2 ft2 
B)  8.948 ft2 
C)  1.894×101 ft2 
D)  1.288×103 ft2 
E)  5.363×104 ft2

Exam 1: Introduction to Chemistry

A comfortable temperature for bath water is 95 ° F. What temperature is this on the Kelvin scale?

How many gallons are present in 43.7 Liters? (1 gallon = 4 quarts and 1 quart = 0.946 L)

An accurate measurement

Choose the best answer to the following math problem ( with the proper number of significant digits and rounded correctly ). (12.3432 - 8.84)×22.48 = ??

How many micrometers, m m, are present in 0.575 mm?

What is the density of mercury when reported to the proper number of significant digits and in scientific notation if a sample is found to have a mass of 524.5 g and occupies a volume of 38.72 ml?

Which measurements below have four significant digits? Measurement I. 0.023 mL II. 2300 mL III. 1700 . mL IV. 0.004050 mL

A compound is:

Which form of substances listed below cannot be separated into simpler substances by chemical or physical means?

A precise measurement

Which of the following is not an element?

What volume of gold has a mass of 25.0 grams? (Density of gold = 19.30 g/mL)

The definition "stable pure substance that cannot be separated into simpler substances by chemical means" would best fit which term listed below?

The dimensions of the following cube were measured. What would be the volume of this cube expressed to the proper number of significant digits? (Volume = l w d )

Of the three properties listed below, which ones are intensive properties? I. mass II. density III. color

"A 33 g sample of red liquid at its freezing point of 260 K had a density of 0.926 g/mL." Which of the properties given in the previous statement is extensive ?

Which of the following matched pairs of elemental names and chemical symbols is properly labeled? I. Calcium, C II. Plutonium, Pt III. Silicon, Si IV. Iron, I V. Nitrogen, N

Convert 26 ° C to kelvins.

The area of a telescope lens is 5773 mm2. What is this area given in square feet, ft2? (1 inch = 2.54 cm)

Atoms, Molecules, and Ions

Equations, the Mole, and Chemical Formulas

Chemical Reactions in Solution

Thermochemistry

The Gaseous State

Electronic Structure

The Periodic Table: Structure and Trends

Chemical Bonds

Molecular Structure and Bonding Theories

Liquids and Solids

Solutions

Chemical Kinetics

Chemical Equilibrium

Solutions of Acids and Bases

Reactions Between Acids and Bases

Chemical Thermodynamics

Electrochemistry

Transition Metals, Coordination Chemistry and Metallurgy

The Chemistry of Hydrogen, Elements in Groups 3A Through 6A, and the Noble Gases

Nuclear Chemistry

Organic Chemistry and Biochemistry

Filters

The area of a telescope lens is 5773 mm². What is this area given in square feet, ft²? (1 inch = 2.54 cm)