Question 1

The correct answer (reported to the proper number of significant figures)to the following is ________. (12.67 + 19.2)(3.99)/ (1.36 + 11.366)= ________

Accepted Answer

A) 9.99851 
B) 9.9985 
C) 9.999 
D) 1.00 × 101 
E) none of the above 
A) 9.99851 
B) 9.9985 
C) 9.999 
D) 1.00 × 101 
E) none of the above D

Question 2

What decimal power does the abbreviation d represent?

Accepted Answer

A) 1 × 10-2 
B) 10 
C) 1 × 10-9 
D) 1 × 10-1 
E) 1 × 103 
A) 1 × 10-2 
B) 10 
C) 1 × 10-9 
D) 1 × 10-1 
E) 1 × 103 D

Question 3

The quantity 1.0 mg/cm2 is the same as 1.0 × ________ kg/m2.

Accepted Answer

A) 10-4 
B) 102 
C) 10-6 
D) 10-2 
E) 104 
A) 10-4 
B) 102 
C) 10-6 
D) 10-2 
E) 104 D

Question 4

The density of mercury is 13.6 g/cm3. The density of mercury is ________ kg/m3.

Accepted Answer

A) 1.36 × 10-2 
B) 1.36 × 104 
C) 1.36 × 108 
D) 1.36 × 10-5 
E) 1.36 × 10-4 
A) 1.36 × 10-2 
B) 1.36 × 104 
C) 1.36 × 108 
D) 1.36 × 10-5 
E) 1.36 × 10-4

Question 5

Of the following, ________ is the largest mass.

Accepted Answer

A) 284.7 Mg 
B) 284.7 dg 
C) 284.7 g 
D) 284.7 Tg 
E) 284.7 Gg 
A) 284.7 Mg 
B) 284.7 dg 
C) 284.7 g 
D) 284.7 Tg 
E) 284.7 Gg

Question 6

The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take ________ days to travel between the Earth and Moon.

Accepted Answer

A) 0.60 
B) 1.7 
C) 3.9 
D) 7.3 
E) 5.6 
A) 0.60 
B) 1.7 
C) 3.9 
D) 7.3 
E) 5.6

Question 7

In which one of the following numbers are none of the zeros significant?

Accepted Answer

A) 10.0 
B) 103 
C) 161.00 
D) 0.00050 
E) 0.009 
A) 10.0 
B) 103 
C) 161.00 
D) 0.00050 
E) 0.009

Question 8

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m3 is ________.

Accepted Answer

A) 2.2 × 10-3 
B) 2.2 × 10-6 
C) 2.2 
D) 2.2 × 103 
E) 2.2 × 106 
A) 2.2 × 10-3 
B) 2.2 × 10-6 
C) 2.2 
D) 2.2 × 103 
E) 2.2 × 106

Question 9

The law of constant composition applies to ________.

Accepted Answer

A) solutions 
B) heterogeneous mixtures 
C) compounds 
D) homogeneous mixtures 
E) solids 
A) solutions 
B) heterogeneous mixtures 
C) compounds 
D) homogeneous mixtures 
E) solids

Question 10

A scientific theory is a concise statement or an equation that summarizes a broad variety of observations.

Accepted Answer

A) True 
 B)False

Question 11

The length of the side of a cube (in cm)having a volume of 44.4 L is ________.

Accepted Answer

A) 875 
B) 35.4 
C) 6.66 
D) 66.6 
E) 0.354 
A) 875 
B) 35.4 
C) 6.66 
D) 66.6 
E) 0.354

Question 12

An element cannot ________.

Accepted Answer

A) be part of a heterogeneous mixture 
B) be part of a homogeneous mixture 
C) be separated into other substances by chemical means 
D) interact with other elements to form compounds 
E) be a pure substance 
A) be part of a heterogeneous mixture 
B) be part of a homogeneous mixture 
C) be separated into other substances by chemical means 
D) interact with other elements to form compounds 
E) be a pure substance

Question 13

There are ________ significant figures in the answer to the following computation:

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 14

1 nanometer = ________ picometers

Accepted Answer

A) 1000 
B) 0.1 
C) 0.01 
D) 1 
E) 10 
A) 1000 
B) 0.1 
C) 0.01 
D) 1 
E) 10

Question 15

Expressing a number in scientific notation ________.

Accepted Answer

A) changes its value 
B) removes ambiguity as to the significant figures 
C) removes significant zeros 
D) allows to increase the number's precision 
E) all of the above 
A) changes its value 
B) removes ambiguity as to the significant figures 
C) removes significant zeros 
D) allows to increase the number's precision 
E) all of the above

Question 16

The density of air under ordinary conditions at 25 °C is 1.19 g/L. How many kilograms of air are in a room that measures 9.0 ft × 11.0 ft and has a 10.0 ft ceiling?

Accepted Answer

A) 2.99 
B) 0.124 
C) 3.34 × 104 
D) 0.0644 
E) 33.4 
A) 2.99 
B) 0.124 
C) 3.34 × 104 
D) 0.0644 
E) 33.4

Question 17

You have to calculate the mass of a 30.0 mL liquid sample with density of 1.52 g/mL, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass?

Accepted Answer

A) If 1 mL of a liquid has the mass of 1.52 g, then 30.0 mL has the mass of __________ g. 
B) If 1.52 mL of a liquid has the mass of 1 g, then 30.0 mL has the mass of __________ g. 
A) If 1 mL of a liquid has the mass of 1.52 g, then 30.0 mL has the mass of __________ g. 
B) If 1.52 mL of a liquid has the mass of 1 g, then 30.0 mL has the mass of __________ g.

Question 18

In which one of the following numbers are all of the zeros significant?

Accepted Answer

A) 100.090090 
B) 0.143290 
C) 0.05843 
D) 0.1000 
E) 00.0030020 
A) 100.090090 
B) 0.143290 
C) 0.05843 
D) 0.1000 
E) 00.0030020

Question 19

The number 1.00430 has ________ significant figures.

Accepted Answer

A) 2 
B) 3 
C) 5 
D) 6 
E) 4 
A) 2 
B) 3 
C) 5 
D) 6 
E) 4

Question 20

The temperature of 25 °C is ________ in Kelvins.

Accepted Answer

A) 103 
B) 138 
C) 166 
D) 248 
E) 298 
A) 103 
B) 138 
C) 166 
D) 248 
E) 298

Exam 1: Introduction: Matter and Measurement

The correct answer (reported to the proper number of significant figures)to the following is ________. (12.67 + 19.2)(3.99)/ (1.36 + 11.366)= ________

What decimal power does the abbreviation d represent?

The quantity 1.0 mg/cm2 is the same as 1.0 × ________ kg/m2.

The density of mercury is 13.6 g/cm3. The density of mercury is ________ kg/m3.

Of the following, ________ is the largest mass.

The distance from the Earth to the Moon is approximately 240,000 miles. If a rocket travels at a speed of 7.50 km/sec, it will take ________ days to travel between the Earth and Moon.

In which one of the following numbers are none of the zeros significant?

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m3 is ________.

The law of constant composition applies to ________.

A scientific theory is a concise statement or an equation that summarizes a broad variety of observations.

The length of the side of a cube (in cm)having a volume of 44.4 L is ________.

An element cannot ________.

There are ________ significant figures in the answer to the following computation:

1 nanometer = ________ picometers

Expressing a number in scientific notation ________.

The density of air under ordinary conditions at 25 °C is 1.19 g/L. How many kilograms of air are in a room that measures 9.0 ft × 11.0 ft and has a 10.0 ft ceiling?

You have to calculate the mass of a 30.0 mL liquid sample with density of 1.52 g/mL, but you have forgotten the formula. Which way of reasoning would help you in finding the correct mass?

In which one of the following numbers are all of the zeros significant?

The number 1.00430 has ________ significant figures.

The temperature of 25 °C is ________ in Kelvins.

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The correct answer (reported to the proper number of significant figures)to the following is . (12.67 + 19.2)(3.99)/ (1.36 + 11.366)=

The quantity 1.0 mg/cm² is the same as 1.0 × ________ kg/m².

The density of mercury is 13.6 g/cm³. The density of mercury is ________ kg/m³.

One edge of a cube is measured and found to be 13 cm. The volume of the cube in m³ is ________.