Question 1

How many Significant Figures does the number 0.005000 have?

Accepted Answer

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

Question 2

The freezing point of water at 1 atm pressure is ________.

Accepted Answer

A) 0 °F 
B) 0 K 
C) 0 °C 
D) -273 °C 
E) -32 °F 
A) 0 °F 
B) 0 K 
C) 0 °C 
D) -273 °C 
E) -32 °F

Question 3

If an object is traveling at a speed of 400 m/s,how long (in hours)will it take to reach 950.5 km?

Accepted Answer

A) 3.96 × 10-2 
B) 7.01 × 10-6 
C) 1.43 × 105 
D) 39.6 
E) 6.34 
A) 3.96 × 10-2 
B) 7.01 × 10-6 
C) 1.43 × 105 
D) 39.6 
E) 6.34

Question 4

You have to calculate the volume of a gas sample with mass of 1.000 × 103 g and density of 1.027 g/L,but you have forgotten the formula.Which way of reasoning would help you in finding the correct mass?

Accepted Answer

A) If 1.027 g of a gas takes up a volume of 1 L, then 1.000 × 103 g of the same gas takes up a volume of ________. 
B) If 1.027 L of gas has a mass of 1 g, then ________ L has the mass of 1.000 × 103 g. 
A) If 1.027 g of a gas takes up a volume of 1 L, then 1.000 × 103 g of the same gas takes up a volume of ________. 
B) If 1.027 L of gas has a mass of 1 g, then ________ L has the mass of 1.000 × 103 g.

Question 5

What is the volume in cm3 of a perfect cube if one edge length measures 1.95 m?

Accepted Answer

A) 3.80 × 106 
B) 7.41 × 106 
C) 3.80 
D) 7.41 
E) 195 
A) 3.80 × 106 
B) 7.41 × 106 
C) 3.80 
D) 7.41 
E) 195

Question 6

________ is the chemical symbol for elemental sodium.

Accepted Answer

A) S 
B) W 
C) So 
D) Na 
E) Sn 
A) S 
B) W 
C) So 
D) Na 
E) Sn

Question 7

The correct result (indicating the proper number of significant figures)of the following problem is ________.

Accepted Answer

A) 113.73635 
B) 113.736 
C) 113.74 
D) 113.7 
E) 1.1 × 102 
A) 113.73635 
B) 113.736 
C) 113.74 
D) 113.7 
E) 1.1 × 102

Question 8

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 9

Round the number 3456.5 to two significant figures.

Accepted Answer

A) 3400.0 
B) 3400 
C) 3000 
D) 3500 
E) 3000.0 
A) 3400.0 
B) 3400 
C) 3000 
D) 3500 
E) 3000.0

Question 10

Round the number 0.007222 to three significant figures.

Accepted Answer

A) 0.007 
B) 0.00722 
C) 0.0072 
D) 0.00723 
E) 0.007225 
A) 0.007 
B) 0.00722 
C) 0.0072 
D) 0.00723 
E) 0.007225

Question 11

An object measuring 25.0 inches will have a length of ________ centimeters.

Accepted Answer

A) 63.5 
B) 9.84 
C) 0.0158 
D) 0.102 
E) 2.54 
A) 63.5 
B) 9.84 
C) 0.0158 
D) 0.102 
E) 2.54

Question 12

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 13

The density of lead is 11.4 g/cm3.The mass of a lead ball with a radius of 0.50 mm is ________ g.

Accepted Answer

A) 6.0 
B) 4.6 × 10-2 
C) 4.6 × 10-5 
D) 6.0 × 10-3 
E) 4.6 
A) 6.0 
B) 4.6 × 10-2 
C) 4.6 × 10-5 
D) 6.0 × 10-3 
E) 4.6

Question 14

Osmium has a density of 22.6 g/cm3.What volume (in cm3)would be occupied by a 21.8 g sample of osmium?

Accepted Answer

A) 0.965 
B) 1.04 
C) 493 
D) 2.03 × 10-3 
E) 2.03 × 103 
A) 0.965 
B) 1.04 
C) 493 
D) 2.03 × 10-3 
E) 2.03 × 103

Question 15

The density of a 167.4 g sample of magnesium having a volume of 96.32 mL is ________ g/cm3.

Accepted Answer

A) 0.5754 
B) 16120 
C) 3.625 
D) 25.26 
E) 1.738 
A) 0.5754 
B) 16120 
C) 3.625 
D) 25.26 
E) 1.738

Question 16

Which of the following is an illustration of the law of constant composition?

Accepted Answer

A) Water boils at 100 °C at 1 atm pressure. 
B) Water is 11% hydrogen and 89% oxygen by mass. 
C) Water can be separated into other substances by a chemical process. 
D) Water and salt have different boiling points. 
E) Water is a compound. 
A) Water boils at 100 °C at 1 atm pressure. 
B) Water is 11% hydrogen and 89% oxygen by mass. 
C) Water can be separated into other substances by a chemical process. 
D) Water and salt have different boiling points. 
E) Water is a compound.

Question 17

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 an increase in 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 an increase in the number's precision 
E) all of the above

Question 18

Which one of the following is often separated into its components by simple techniques such as filtering or decanting?

Accepted Answer

A) heterogeneous mixture 
B) compounds 
C) homogeneous mixture 
D) elements 
E) solutions 
A) heterogeneous mixture 
B) compounds 
C) homogeneous mixture 
D) elements 
E) solutions

Question 19

Which one of the following has the element name and symbol correctly matched?

Accepted Answer

A) S, sodium 
B) Tn, tin 
C) Fe, iron 
D) N, neon 
E) B, bromine 
A) S, sodium 
B) Tn, tin 
C) Fe, iron 
D) N, neon 
E) B, bromine

Question 20

A statement or mathematical equation which is based on repeated observations is called a(n)________.

Accepted Answer

A) law 
B) theory 
C) hypothesis 
D) experiment 
E) test 
A) law 
B) theory 
C) hypothesis 
D) experiment 
E) test

Exam 1: Introduction: Matter, energy, and Measurement

How many Significant Figures does the number 0.005000 have?

The freezing point of water at 1 atm pressure is ________.

If an object is traveling at a speed of 400 m/s,how long (in hours)will it take to reach 950.5 km?

You have to calculate the volume of a gas sample with mass of 1.000 × 103 g and density of 1.027 g/L,but you have forgotten the formula.Which way of reasoning would help you in finding the correct mass?

What is the volume in cm3 of a perfect cube if one edge length measures 1.95 m?

________ is the chemical symbol for elemental sodium.

The correct result (indicating the proper number of significant figures)of the following problem is ________.

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?

Round the number 3456.5 to two significant figures.

Round the number 0.007222 to three significant figures.

An object measuring 25.0 inches will have a length of ________ centimeters.

The number 1.00430 has ________ significant figures.

The density of lead is 11.4 g/cm3.The mass of a lead ball with a radius of 0.50 mm is ________ g.

Osmium has a density of 22.6 g/cm3.What volume (in cm3)would be occupied by a 21.8 g sample of osmium?

The density of a 167.4 g sample of magnesium having a volume of 96.32 mL is ________ g/cm3.

Which of the following is an illustration of the law of constant composition?

Expressing a number in scientific notation ________.

Which one of the following is often separated into its components by simple techniques such as filtering or decanting?

Which one of the following has the element name and symbol correctly matched?

A statement or mathematical equation which is based on repeated observations is called a(n)________.

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

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

You have to calculate the volume of a gas sample with mass of 1.000 × 10³ g and density of 1.027 g/L,but you have forgotten the formula.Which way of reasoning would help you in finding the correct mass?

What is the volume in cm³of a perfect cube if one edge length measures 1.95 m?

The density of lead is 11.4 g/cm³.The mass of a lead ball with a radius of 0.50 mm is ________ g.

Osmium has a density of 22.6 g/cm³.What volume (in cm³)would be occupied by a 21.8 g sample of osmium?

The density of a 167.4 g sample of magnesium having a volume of 96.32 mL is ________ g/cm³.