Question 1

Express 7,500 nm as picometers.

Accepted Answer

A) 7.50 pm 
B) 75.0 pm 
C) 750 pm 
D) 7.5 * 106 pm 
E) 7.5 * 1012 pm 
A) 7.50 pm 
B) 75.0 pm 
C) 750 pm 
D) 7.5 * 106 pm 
E) 7.5 * 1012 pm

Question 2

An investor paid market price for a chunk of gold that he was told was pure. The gold bar had a mass of 440 g, but was slightly irregular so an exact volume could not be calculated. The investor filled a large graduated cylinder with water, immersed the chunk of gold, and observed an increase in the apparent volume of material in the graduated cylinder of 25.0 mL. Pure gold has a density of 19.3 g/cm3. Did the investor get her money's worth? Why or why not?

Accepted Answer

No. The investor's m

Question 3

Complete the following sentence. A scientific law is

Accepted Answer

A) a tentative explanation for a set of observations that can be tested by further experimentation. 
B) a statement describing a relationship between phenomena that is always the same under the same conditions. 
C) a unifying principle that explains a body of facts and relations. 
D) a model used to visualize the invisible. 
A) a tentative explanation for a set of observations that can be tested by further experimentation. 
B) a statement describing a relationship between phenomena that is always the same under the same conditions. 
C) a unifying principle that explains a body of facts and relations. 
D) a model used to visualize the invisible.

Question 4

The density of lead is 11.4 g/cm3 at 25$\circ$C. Calculate the volume occupied by 25.0 g of lead.

Accepted Answer

A) 2.19 cm3 
B) 0.456 cm3 
C) 285 cm3 
D) 1.24 cm3 
E) 6.05 cm3 
A) 2.19 cm3 
B) 0.456 cm3 
C) 285 cm3 
D) 1.24 cm3 
E) 6.05 cm3

Question 5

The mass of a body varies according to the force of gravity exerted on the body.

Accepted Answer

A) True 
 B)False

Question 6

How many significant figures are there in 1.3070 g?

Accepted Answer

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

Question 7

Do the indicated arithmetic and give the answer to the correct number of significant figures. (1.5 * 10-4 * 61.3)+ 2.01 =

Accepted Answer

A) 2.0192 
B) 2.0 
C) 2.019 
D) 2.02 
E) 2.019195 
A) 2.0192 
B) 2.0 
C) 2.019 
D) 2.02 
E) 2.019195

Question 8

Which of the following speeds is the greatest? (1 mile = 1609 m)

Accepted Answer

A) 40 mi/h 
B) 2.0 * 105 mm/min 
C) 40 km/h 
D) 0.74 km/min 
E) 400 m/min 
A) 40 mi/h 
B) 2.0 * 105 mm/min 
C) 40 km/h 
D) 0.74 km/min 
E) 400 m/min

Question 9

Express the number 26.7 in scientific notation.

Accepted Answer

A) 2.67 * 10-2 
B) 2.67 * 10-1 
C) 2.67 * 101 
D) 2.67 * 102 
E) 26.7 is already written in scientific notation 
A) 2.67 * 10-2 
B) 2.67 * 10-1 
C) 2.67 * 101 
D) 2.67 * 102 
E) 26.7 is already written in scientific notation

Question 10

Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is

Accepted Answer

A) 0.141 cm3. 
B) 7.11 cm3. 
C) 2.8 cm3. 
D) 439 cm3. 
E) None of the above. 
A) 0.141 cm3. 
B) 7.11 cm3. 
C) 2.8 cm3. 
D) 439 cm3. 
E) None of the above.

Question 11

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm3)

Accepted Answer

A) 2.0 g 
B) 4.0 g 
C) 5.1 g 
D) 508 g 
E) 400 g 
A) 2.0 g 
B) 4.0 g 
C) 5.1 g 
D) 508 g 
E) 400 g

Question 12

A person weighs 150 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given? (2.20 lb = 1 kg)

Accepted Answer

The answer of A person weighs 150 lb, and the...

Question 13

How many square kilometers are equivalent to 28.5 cm2?

Accepted Answer

A) 2.85 * 10-9 km2 
B) 2.85 * 10-6 km2 
C) 285 km2 
D) 2.85 * 10-4 km2 
E) none of these 
A) 2.85 * 10-9 km2 
B) 2.85 * 10-6 km2 
C) 285 km2 
D) 2.85 * 10-4 km2 
E) none of these

Express 7,500 nm as picometers.

Complete the following sentence. A scientific law is

The density of lead is 11.4 g/cm³ at 25^$\circ$C. Calculate the volume occupied by 25.0 g of lead.

The mass of a body varies according to the force of gravity exerted on the body.

How many significant figures are there in 1.3070 g?

Do the indicated arithmetic and give the answer to the correct number of significant figures. (1.5 * 10^-4 * 61.3)+ 2.01 =

Which of the following speeds is the greatest? (1 mile = 1609 m)

Express the number 26.7 in scientific notation.

Iron has a density of 7.86 g/cm³. The volume occupied by 55.85 g of iron is

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm³)

A person weighs 150 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given? (2.20 lb = 1 kg)

How many square kilometers are equivalent to 28.5 cm²?

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

Exam 1: Introduction

Express 7,500 nm as picometers.

Complete the following sentence. A scientific law is

The density of lead is 11.4 g/cm3 at 25 ∘\circ∘ C. Calculate the volume occupied by 25.0 g of lead.

The mass of a body varies according to the force of gravity exerted on the body.

How many significant figures are there in 1.3070 g?

Do the indicated arithmetic and give the answer to the correct number of significant figures. (1.5 * 10-4 * 61.3)+ 2.01 =

Which of the following speeds is the greatest? (1 mile = 1609 m)

Express the number 26.7 in scientific notation.

Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm3)

A person weighs 150 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given? (2.20 lb = 1 kg)

How many square kilometers are equivalent to 28.5 cm2?

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

The density of lead is 11.4 g/cm³ at 25^$\circ$C. Calculate the volume occupied by 25.0 g of lead.

Do the indicated arithmetic and give the answer to the correct number of significant figures. (1.5 * 10^-4 * 61.3)+ 2.01 =

Iron has a density of 7.86 g/cm³. The volume occupied by 55.85 g of iron is

One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? (Given: density of physiological saline = 1.005 g/cm³)

How many square kilometers are equivalent to 28.5 cm²?