Question 1

Convert 5.67 x 104 millimeters into centimeters.

Accepted Answer

5.67 x 10³ cm

Question 2

The density of mercury is 13.6 g/ml and the density of gold is 19.3 g/mL. Which occupies a greater volume, 8.3 g of mercury or 8.3 g of gold?

Accepted Answer

Mercury

Question 3

What is the number of 1-1/2 teaspoon doses of a liquid medication in a 250 mL bottle? (Given 1 tsp = 5 mL.)

Accepted Answer

A)  33 doses 
B)  125 doses 
C)  167 doses 
D)  250 doses 
A)  33 doses 
B)  125 doses 
C)  167 doses 
D)  250 doses A

Question 4

At 20$\degree$C, chloroform (CHCl3) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20 $\degree$C?

Accepted Answer

A)  0.198 g 
B)  13.4 g 
C)  5.05 g 
D)  11.2 g 
A)  0.198 g 
B)  13.4 g 
C)  5.05 g 
D)  11.2 g

Question 5

A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scientist is able to duplicate the results. The statement by Dr. Sigma is ___.

Accepted Answer

A)  a law 
B)  a hypothesis 
C)  a theory 
D)  not valid 
A)  a law 
B)  a hypothesis 
C)  a theory 
D)  not valid

Question 6

At 20$\degree$C, the density of ethyl alcohol is 0.789 g/mL, and that of water is 1.00 g/mL. Calculate the specific gravity of ethyl alcohol at 20 $\degree$C.

Accepted Answer

A)  0.651 
B)  0.789 
C)  1.45 
D)  6.51 
A)  0.651 
B)  0.789 
C)  1.45 
D)  6.51

Question 7

The density of table salt is 2.16 g/mL. What is the volume in milliliters occupied by 356.0 g of table salt?

Accepted Answer

A)  165 mL 
B)  769 mL 
C)  0.00607 mL 
D)  358 mL 
A)  165 mL 
B)  769 mL 
C)  0.00607 mL 
D)  358 mL

Question 8

When 15.5 + 0.125 + 2.55 are added, assuming each of the numbers below is measured, the answer with the correct number of significant figures is ___.

Accepted Answer

A)  18.175 
B)  18.2 
C)  18.17 
D)  18 
A)  18.175 
B)  18.2 
C)  18.17 
D)  18

Question 9

A child with a mass of 35.4 kg has a fever. The proper dosage of acetominophen is 15.0 mg/kg of body weight. How many teaspoons of syrup will you give the child if the syrup contains 160 mg of acetominophen/teaspoon?

Accepted Answer

The answer of A child with a mass of 35.4...

Question 10

Which of the following explanations is a testable hypothesis?

Accepted Answer

A)  A sugar crystal is forming faster because it is grown in cold environment. 
B)  A plant is dying because of the direction of spinning of the earth. 
C)  A bird lays more eggs because of the intensity of thunderstorms. 
D)  A burp increases the weight of a baby. 
A)  A sugar crystal is forming faster because it is grown in cold environment. 
B)  A plant is dying because of the direction of spinning of the earth. 
C)  A bird lays more eggs because of the intensity of thunderstorms. 
D)  A burp increases the weight of a baby.

Question 11

The energy required to melt a solid is called the ___.

Accepted Answer

The answer of The energy required to melt a solid...

Question 12

The correct conversion of 1 L is ___.

Accepted Answer

A)  1 m3 
B)  1000 m3 
C)  0.001 m3 
D)  100 m3 
A)  1 m3 
B)  1000 m3 
C)  0.001 m3 
D)  100 m3

Question 13

Which of the following numbers contains the designated CORRECT number of significant figures?

Accepted Answer

A)  30.1 $\degree$C 2 significant figures 
B)  3.6 x 102m 3 significant figures 
C)  0.00450 m 3 significant figures 
D)  27.051 mL 4 significant figures 
A)  30.1 $\degree$C 2 significant figures 
B)  3.6 x 102m 3 significant figures 
C)  0.00450 m 3 significant figures 
D)  27.051 mL 4 significant figures

Question 14

The value 1.000 kg has ___ significant figures.

Accepted Answer

The answer of The value 1.000 kg has ___ significant...

Question 15

A mercury thermometer is used to take four temperatures of a solution. The temperatures are 44.8 ºC, 44.9 ºC, 45.0 ºC, and 45.1 ºC. An alcohol thermometer was also used and measured 44.9 ºC, 45.3 ºC, 45.4 ºC, and 45.9 ºC. The solution is correctly determined to be 45.0 ºC by other means. Which conclusion is correct?

Accepted Answer

A)  The mercury thermometer is the more precise. 
B)  The alcohol thermometer is the more precise. 
C)  There is no difference between the thermometers. 
D)  There is no way to determine precision with these temperatures. 
A)  The mercury thermometer is the more precise. 
B)  The alcohol thermometer is the more precise. 
C)  There is no difference between the thermometers. 
D)  There is no way to determine precision with these temperatures.

Question 16

When a steak is cooked on a grill the meat undergoes a ___ change.

Accepted Answer

The answer of When a steak is cooked on a...

Question 17

Which of the following is an example of a physical change?

Accepted Answer

A)  a piece of paper cut into small pieces 
B)  burning of paper 
C)  butter becoming rancid 
D)  baking a cookie 
A)  a piece of paper cut into small pieces 
B)  burning of paper 
C)  butter becoming rancid 
D)  baking a cookie

Question 18

Zenapax is used as part of immunosuppressive therapy for transplant patients. The dosage is calculated on the basis of 1.0 mg/kg. What is the proper dose for a 175 lb patient? (Given: 1kg = 2.205 lbs.)

Accepted Answer

A)  79 mg 
B)  175 mg 
C)  385 mg 
D)  875 mg 
A)  79 mg 
B)  175 mg 
C)  385 mg 
D)  875 mg

Question 19

Match the following as a theory or law:
-atoms are composed of protons, neutrons, and electrons

Accepted Answer

A)  theory 
B)  law 
A)  theory 
B)  law

Question 20

Scientific laws differ from scientific theories in that

Accepted Answer

A)  laws explain observations and theories describe observations. 
B)  laws describe observations and theories explain observations. 
C)  theories eventually become laws. 
D)  No difference exists. Laws and theories have the same meaning. 
A)  laws explain observations and theories describe observations. 
B)  laws describe observations and theories explain observations. 
C)  theories eventually become laws. 
D)  No difference exists. Laws and theories have the same meaning.

Convert 5.67 x 10⁴ millimeters into centimeters.

The density of mercury is 13.6 g/ml and the density of gold is 19.3 g/mL. Which occupies a greater volume, 8.3 g of mercury or 8.3 g of gold?

What is the number of 1-1/2 teaspoon doses of a liquid medication in a 250 mL bottle? (Given 1 tsp = 5 mL.)

At 20 $\degree$ C, chloroform (CHCl₃) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20 $\degree$ C?

A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scientist is able to duplicate the results. The statement by Dr. Sigma is ___.

At 20 $\degree$ C, the density of ethyl alcohol is 0.789 g/mL, and that of water is 1.00 g/mL. Calculate the specific gravity of ethyl alcohol at 20 $\degree$ C.

The density of table salt is 2.16 g/mL. What is the volume in milliliters occupied by 356.0 g of table salt?

When 15.5 + 0.125 + 2.55 are added, assuming each of the numbers below is measured, the answer with the correct number of significant figures is ___.

A child with a mass of 35.4 kg has a fever. The proper dosage of acetominophen is 15.0 mg/kg of body weight. How many teaspoons of syrup will you give the child if the syrup contains 160 mg of acetominophen/teaspoon?

Which of the following explanations is a testable hypothesis?

The energy required to melt a solid is called the ___.

The correct conversion of 1 L is ___.

Which of the following numbers contains the designated CORRECT number of significant figures?

The value 1.000 kg has ___ significant figures.

When a steak is cooked on a grill the meat undergoes a ___ change.

Which of the following is an example of a physical change?

Zenapax is used as part of immunosuppressive therapy for transplant patients. The dosage is calculated on the basis of 1.0 mg/kg. What is the proper dose for a 175 lb patient? (Given: 1kg = 2.205 lbs.)

Match the following as a theory or law: -atoms are composed of protons, neutrons, and electrons

Scientific laws differ from scientific theories in that

Atoms and Elements

Compounds

An Introduction to Organic Compounds

Reactions

Gases, Solutions, Colloids, and Suspensions

Acids, Bases, and Equilibrium

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

Lipids and Membranes

Peptides, Proteins, and Enzymes

Nucleic Acids

Metabolism

Filters

Exam 1: Science and Measurements

Convert 5.67 x 104 millimeters into centimeters.

The density of mercury is 13.6 g/ml and the density of gold is 19.3 g/mL. Which occupies a greater volume, 8.3 g of mercury or 8.3 g of gold?

What is the number of 1-1/2 teaspoon doses of a liquid medication in a 250 mL bottle? (Given 1 tsp = 5 mL.)

At 20 °\degree° C, chloroform (CHCl3) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20 °\degree° C?

A scientist, Dr. Sigma, states that a chemical taken internally once a day will prevent the common cold. However, no other scientist is able to duplicate the results. The statement by Dr. Sigma is ___.

At 20 °\degree° C, the density of ethyl alcohol is 0.789 g/mL, and that of water is 1.00 g/mL. Calculate the specific gravity of ethyl alcohol at 20 °\degree° C.

The density of table salt is 2.16 g/mL. What is the volume in milliliters occupied by 356.0 g of table salt?

When 15.5 + 0.125 + 2.55 are added, assuming each of the numbers below is measured, the answer with the correct number of significant figures is ___.

A child with a mass of 35.4 kg has a fever. The proper dosage of acetominophen is 15.0 mg/kg of body weight. How many teaspoons of syrup will you give the child if the syrup contains 160 mg of acetominophen/teaspoon?

Which of the following explanations is a testable hypothesis?

The energy required to melt a solid is called the ___.

The correct conversion of 1 L is ___.

Which of the following numbers contains the designated CORRECT number of significant figures?

The value 1.000 kg has ___ significant figures.

When a steak is cooked on a grill the meat undergoes a ___ change.

Which of the following is an example of a physical change?

Zenapax is used as part of immunosuppressive therapy for transplant patients. The dosage is calculated on the basis of 1.0 mg/kg. What is the proper dose for a 175 lb patient? (Given: 1kg = 2.205 lbs.)

Match the following as a theory or law: -atoms are composed of protons, neutrons, and electrons

Scientific laws differ from scientific theories in that

Atoms and Elements

Compounds

An Introduction to Organic Compounds

Reactions

Gases, Solutions, Colloids, and Suspensions

Acids, Bases, and Equilibrium

Organic Reactions Hydrocarbons, Carboxlic Acids, Amines, and Related Compounds

Organic Reactions 2-Alcohols, Ethers, Aldehydes, and Ketones

Carbohydrates

Lipids and Membranes

Peptides, Proteins, and Enzymes

Nucleic Acids

Metabolism

Filters

Convert 5.67 x 10⁴ millimeters into centimeters.

At 20 $\degree$ C, chloroform (CHCl₃) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20 $\degree$ C?

At 20 $\degree$ C, the density of ethyl alcohol is 0.789 g/mL, and that of water is 1.00 g/mL. Calculate the specific gravity of ethyl alcohol at 20 $\degree$ C.