Question 1

Which of the following does not have a uniform composition throughout?

Accepted Answer

A)   Element
B)   Compound
C)   Homogeneous mixture
D)   Heterogeneous mixture
E)   SolventF) B) and E)
G) None of the above

Question 2

Explain the difference between accuracy and precision.

Accepted Answer

Accuracy tells us how close a ...

Question 3

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Accepted Answer

A)   13.3568
B)   13.357
C)   13.36
D)   13.4
E)   13F) D) and E)
G) All of the above

Question 4

Which of the following properly expresses 0.01234 in scientific notation?

Accepted Answer

A)   1.234 × 10-3
B)   12.3 × 104
C)   1 × 10-1 
D)   1.234 × 102
E)   1.234 × 10-2F) C) and D)
G) A) and B)

Question 5

When applying the scientific method, a model or theory should be based on experimental data.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following represents the greatest mass?

Accepted Answer

A)   2.0 x 103 mg
B)   10.0 dg
C)   0.0010 kg
D)   1.0 x 106 µg
E)   3.0 x 1012 pgF) A) and C)
G) A) and B)

Question 7

If you have a graduated cylinder containing 15.5 mL of water and this volume increases to 95.2 mL after a piece of metal with a mass of 7.95 g is dropped into the graduated cylinder, then what is the density of the metal?

Accepted Answer

A)   0.0835 g/mL
B)   0.513 g/mL
C)   0.0718 g/mL
D)   10.0 g/mL
E)   9.97 × 10-2 g/mLF) B) and C)
G) D) and E)

Question 8

The juice from an orange is a mixture.

Accepted Answer

A) True 
 B)False

Question 9

Which one of these represents a physical change?

Accepted Answer

A)   Water, when heated, 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.F) C) and D)
G) None of the above

Question 10

The city of Los Angeles is now approximately 2400 miles south of Anchorage, Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage in 76 million years, at what average rate will it have to move in mm per month? (1 mi = 1609 m)

Accepted Answer

A)   2.0 × 10-10 mm/mo.
B)   6.6 × 10-6 mm/mo.
C)   4.2 mm/mo.
D)   9.5 mm/mo.
E)   51 mm/mo.F) B) and E)
G) C) and D)

Question 11

If two numbers are added together, one which has 2 digits after the decimal point and the other which has 1 digit after the decimal point, explain how to round the answer.

Accepted Answer

The answer will have 1 digit after the d...

Question 12

Dry ice (carbon dioxide)  changes from a solid to a gas at -78.5°C. What is this temperature in °F?

Accepted Answer

A)   -173°F
B)   -12.6°F
C)   -109°F
D)   -75.6°F
E)   None of them is within 2°F of the right answer.F) C) and D)
G) A) and E)

Question 13

What is something that has a definite composition?

Accepted Answer

The answer of What is something that has a definite...

Question 14

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in meters. (1 mi = 1609 m)

Accepted Answer

A)   6.1 × 105 m
B)   5.3 × 105 m
C)   3.9 × 108 m
D)   1.5 × 105 m
E)   9.4 × 104 mF) B) and C)
G) A) and C)

Question 15

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the temperature of the measurement.)

Accepted Answer

A)   1.992 g/cm3
B)   1.840 g/cm3
C)   1.729 g/cm3 
D)   1.598 g/cm3
E)   0.543 g/cm3F) A) and D)
G) B) and E)

Question 16

Melting ice is a ________ change.

Accepted Answer

The answer of Melting ice is a ________ change....

Question 17

How many inches are in 382.5 cm? (1 in = 2.54 cm) ?

Accepted Answer

A)   150.6 in
B)   6.641 × 10-3 in
C)   151 in
D)   971.6 in
E)   972 inF) B) and C)
G) A) and E)

Question 18

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Accepted Answer

A)   5.5 × 108 kg
B)   5.5 × 105 kg
C)   5.5 × 10-4 kg
D)   5.5 × 10-6 kg
E)   5.5 × 10-1 kgF) A) and B)
G) A) and D)

Question 19

Explain the difference between quantitative measurements and qualitative measurements.

Accepted Answer

A quantitative measurement is ...

Question 20

A large pizza has a diameter of 15 inches. Express this diameter in centimeters. (1 in = 2.54 cm)

Accepted Answer

A)   38 cm
B)   24 cm
C)   18 cm
D)   9.3 cm
E)   5.9 cmF) C) and D)
G) B) and C)

Exam 1: Chemistry: the Central Science

Explain the difference between quantitative measurements and qualitative measurements.

Correct Answer
verified
A quantitative measurement is ...
View Answer

Which of the following properly expresses 0.01234 in scientific notation?

Correct Answer
verified

Which of the following does not have a uniform composition throughout?

Correct Answer
verified

Which of the following represents the greatest mass?

Correct Answer
verified

A large pizza has a diameter of 15 inches. Express this diameter in centimeters. (1 in = 2.54 cm)

Correct Answer
verified

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Correct Answer
verified

Melting ice is a ________ change.

Correct Answer
verified

The juice from an orange is a mixture.

Correct Answer
verified

If you have a graduated cylinder containing 15.5 mL of water and this volume increases to 95.2 mL after a piece of metal with a mass of 7.95 g is dropped into the graduated cylinder, then what is the density of the metal?

Correct Answer
verified

Explain the difference between accuracy and precision.

Correct Answer
verified
Accuracy tells us how close a ...
View Answer

How many inches are in 382.5 cm? (1 in = 2.54 cm) ?

Correct Answer
verified

Correct Answer
verified

Dry ice (carbon dioxide) changes from a solid to a gas at -78.5°C. What is this temperature in °F?

Correct Answer
verified

Which one of these represents a physical change?

Correct Answer
verified

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct Answer
verified

If two numbers are added together, one which has 2 digits after the decimal point and the other which has 1 digit after the decimal point, explain how to round the answer.

Correct Answer
verified
The answer will have 1 digit after the d...
View Answer

When applying the scientific method, a model or theory should be based on experimental data.

Correct Answer
verified

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in meters. (1 mi = 1609 m)

Correct Answer
verified

The city of Los Angeles is now approximately 2400 miles south of Anchorage, Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage in 76 million years, at what average rate will it have to move in mm per month? (1 mi = 1609 m)

Correct Answer
verified

What is something that has a definite composition?

Correct Answer
verified

Exam 1: Chemistry: the Central Science

Explain the difference between quantitative measurements and qualitative measurements.

Correct AnswerverifiedA quantitative measurement is ...View AnswerShow Answer

Which of the following properly expresses 0.01234 in scientific notation?

Correct AnswerverifiedShow Answer

Which of the following does not have a uniform composition throughout?

Correct AnswerverifiedShow Answer

Which of the following represents the greatest mass?

Correct AnswerverifiedShow Answer

A large pizza has a diameter of 15 inches. Express this diameter in centimeters. (1 in = 2.54 cm)

Correct AnswerverifiedShow Answer

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

Correct AnswerverifiedShow Answer

Melting ice is a ________ change.

Correct AnswerverifiedShow Answer

The juice from an orange is a mixture.

Correct AnswerverifiedShow Answer

If you have a graduated cylinder containing 15.5 mL of water and this volume increases to 95.2 mL after a piece of metal with a mass of 7.95 g is dropped into the graduated cylinder, then what is the density of the metal?

Correct AnswerverifiedShow Answer

Explain the difference between accuracy and precision.

Correct AnswerverifiedAccuracy tells us how close a ...View AnswerShow Answer

How many inches are in 382.5 cm? (1 in = 2.54 cm) ?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Dry ice (carbon dioxide) changes from a solid to a gas at -78.5°C. What is this temperature in °F?

Correct AnswerverifiedShow Answer

Which one of these represents a physical change?

Correct AnswerverifiedShow Answer

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct AnswerverifiedShow Answer

If two numbers are added together, one which has 2 digits after the decimal point and the other which has 1 digit after the decimal point, explain how to round the answer.

Correct AnswerverifiedThe answer will have 1 digit after the d...View AnswerShow Answer

When applying the scientific method, a model or theory should be based on experimental data.

Correct AnswerverifiedShow Answer

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in meters. (1 mi = 1609 m)

Correct AnswerverifiedShow Answer

The city of Los Angeles is now approximately 2400 miles south of Anchorage, Alaska. It is moving slowly northward as the San Andreas fault slides along. If Los Angeles is to arrive near Anchorage in 76 million years, at what average rate will it have to move in mm per month? (1 mi = 1609 m)

Correct AnswerverifiedShow Answer

What is something that has a definite composition?

Correct AnswerverifiedShow Answer

Correct Answer
verified
A quantitative measurement is ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Accuracy tells us how close a ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The answer will have 1 digit after the d...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified