Question 1

Identify the following as a physical or chemical change: Ripening of fruit.

Accepted Answer

The answer of Identify the following as a physical or...

Question 2

Classify the following as an element, a compound, or a mixture: Table salt (non-iodized).

Accepted Answer

The answer of Classify the following as an element, a...

Question 3

How many significant figures does the result of the following operation contain? 8.52010 * 7.9

Accepted Answer

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

Question 4

Define compound.

Accepted Answer

A compound is a substance comp

Question 5

All of the following are properties of tin. Which one is a chemical property of tin?

Accepted Answer

A) Tin can be hammered into a thin sheet. 
B) At -40$\circ$C a sheet of tin crumbles to a gray powder. 
C) Tin melts at 231.9$\circ$C. 
D) When a bar of tin is bent, it emits an audible "cry". 
E) Tin erodes when added to hydrochloric acid, and a clear gas forms. 
A) Tin can be hammered into a thin sheet. 
B) At -40$\circ$C a sheet of tin crumbles to a gray powder. 
C) Tin melts at 231.9$\circ$C. 
D) When a bar of tin is bent, it emits an audible "cry". 
E) Tin erodes when added to hydrochloric acid, and a clear gas forms.

Question 6

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in liters.

Accepted Answer

Question 7

The "escape velocity" from Earth (the speed required to escape Earth's gravity)is 2.5 * 104 miles per hour. What is this speed in m/s? (1 mile = 1609 m)

Accepted Answer

A) 4.2 * 10-3 m/s 
B) 6.9 m/s 
C) 4.2 * 102 m/s 
D) 1.1 * 104 m/s 
E) 4.0 * 107 m/s 
A) 4.2 * 10-3 m/s 
B) 6.9 m/s 
C) 4.2 * 102 m/s 
D) 1.1 * 104 m/s 
E) 4.0 * 107 m/s

Question 8

An American engineer who had been transferred to Europe was asked to build bridge pilings exactly as he had in the United States. Each piling required 20.0 cubic yards of concrete in the United States. How many cubic meters of concrete are required for each piling? Given: 1 yd = 0.914 m.

Accepted Answer

The answer of An American engineer who had been transferred...

Question 9

A US barrel is 4.21 cubic feet. Express this volume in liters.

Accepted Answer

A) 3.99 * 10-5 L 
B) 1.99 * 10-2 L 
C) 19.9 L 
D) 105 L 
E) 119 L 
A) 3.99 * 10-5 L 
B) 1.99 * 10-2 L 
C) 19.9 L 
D) 105 L 
E) 119 L

Question 10

When 7.02oC is converted to the Fahrenheit scale, how many significant figures are there in the $\circ$F result?

Accepted Answer

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

Question 11

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm3 at 25$\circ$C).

Accepted Answer

A) 3.13 * 10 -5 g 
B) 32.0 kg 
C) 53.2 kg 
D) 53.2 g 
E) None of the above. 
A) 3.13 * 10 -5 g 
B) 32.0 kg 
C) 53.2 kg 
D) 53.2 g 
E) None of the above.

Question 12

Define element.

Accepted Answer

An element is a subs

Question 13

An archeologist finds a huge monolith in the desert. In order to estimate the weight of this object; he estimates the dimensions of the monolith and removes some chips from the rock with his hammer, collecting the following data:
dimensions of the monolith = 1.5 m * 5.2 m * 13 m
mass of rock chips = 41.73 g
volume of rock chips = 15.2 cm3
 Determine the mass of the monolith in pounds, assuming it is of uniform composition. (1 lb = 453.6 g)

Accepted Answer

Question 14

Iridium is essentially tied with osmium for the distinction of being called the "densest element" with a density of 22.5 g/cm3. What would be the mass in pounds of a 1.0 ft * 1.0 ft * 1.0 ft cube of iridium? (1 lb = 453.6 g)

Accepted Answer

A) 1.5 lb 
B) 5.2 lb 
C) 6.20 lb 
D) 1.4 * 10 3 lb 
E) 6.4 * 10 5 lb 
A) 1.5 lb 
B) 5.2 lb 
C) 6.20 lb 
D) 1.4 * 10 3 lb 
E) 6.4 * 10 5 lb

Question 15

Which one of the following represents a physical change?

Accepted Answer

A) water, when heated to 100$\circ$C, forms steam 
B) bleach turns hair yellow 
C) sugar, when heated, becomes brown 
D) milk turns sour 
E) apples, when exposed to air, turn brown 
A) water, when heated to 100$\circ$C, forms steam 
B) bleach turns hair yellow 
C) sugar, when heated, becomes brown 
D) milk turns sour 
E) apples, when exposed to air, turn brown

Question 16

Classify the following as an element, a compound, or a mixture: Chicken broth.

Accepted Answer

The answer of Classify the following as an element, a...

Question 17

Lead melts at 601.0$\circ$C. What temperature is this in oF?

Accepted Answer

A) 302$\circ$F 
B) 365$\circ$F 
C) 1,050$\circ$F 
D) 1,082$\circ$F 
E) 1,114$\circ$F 
A) 302$\circ$F 
B) 365$\circ$F 
C) 1,050$\circ$F 
D) 1,082$\circ$F 
E) 1,114$\circ$F

Question 18

Identify the following as a physical or chemical change: Fermenting grapes.

Accepted Answer

The answer of Identify the following as a physical or...

Question 19

Express the fraction 1/51 in scientific notation to 3 significant figures.

Accepted Answer

A) 2 * 10-2.00 
B) 2.0 * 10-2.00 
C) 1.96 * 10-2 
D) 1.97 * 10-2 
E) 2.00 * 10-2 
A) 2 * 10-2.00 
B) 2.0 * 10-2.00 
C) 1.96 * 10-2 
D) 1.97 * 10-2 
E) 2.00 * 10-2

Question 20

cut the toast in half
Which of these are chemical processes?

Accepted Answer

2 (frying

Exam 1: Introduction

Identify the following as a physical or chemical change: Ripening of fruit.

Classify the following as an element, a compound, or a mixture: Table salt (non-iodized).

How many significant figures does the result of the following operation contain? 8.52010 * 7.9

Define compound.

All of the following are properties of tin. Which one is a chemical property of tin?

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in liters.

The "escape velocity" from Earth (the speed required to escape Earth's gravity)is 2.5 * 104 miles per hour. What is this speed in m/s? (1 mile = 1609 m)

An American engineer who had been transferred to Europe was asked to build bridge pilings exactly as he had in the United States. Each piling required 20.0 cubic yards of concrete in the United States. How many cubic meters of concrete are required for each piling? Given: 1 yd = 0.914 m.

A US barrel is 4.21 cubic feet. Express this volume in liters.

When 7.02oC is converted to the Fahrenheit scale, how many significant figures are there in the ∘\circ∘ F result?

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm3 at 25 ∘\circ∘ C).

Define element.

Iridium is essentially tied with osmium for the distinction of being called the "densest element" with a density of 22.5 g/cm3. What would be the mass in pounds of a 1.0 ft * 1.0 ft * 1.0 ft cube of iridium? (1 lb = 453.6 g)

Which one of the following represents a physical change?

Classify the following as an element, a compound, or a mixture: Chicken broth.

Lead melts at 601.0 ∘\circ∘ C. What temperature is this in oF?

Identify the following as a physical or chemical change: Fermenting grapes.

Express the fraction 1/51 in scientific notation to 3 significant figures.

cut the toast in half Which of these are chemical processes?

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

An automobile engine has a piston displacement of 1,600 cm³. Express this volume in liters.

The "escape velocity" from Earth (the speed required to escape Earth's gravity)is 2.5 * 10⁴ miles per hour. What is this speed in m/s? (1 mile = 1609 m)

When 7.02^oC is converted to the Fahrenheit scale, how many significant figures are there in the ^$\circ$F result?

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm³ at 25^$\circ$C).

Iridium is essentially tied with osmium for the distinction of being called the "densest element" with a density of 22.5 g/cm³. What would be the mass in pounds of a 1.0 ft * 1.0 ft * 1.0 ft cube of iridium? (1 lb = 453.6 g)

Lead melts at 601.0^$\circ$C. What temperature is this in ^oF?