Question 1

Which of the following substances are composed of heteroatomic molecules?

Accepted Answer

A)  an iron nail 
B)  oxygen 
C)  copper wire 
D)  water 
A)  an iron nail 
B)  oxygen 
C)  copper wire 
D)  water

Question 2

Any two objects are attracted to each other by _____ .

Accepted Answer

A)  gravity 
B)  electrostatic forces 
C)  magnetism 
D)  all of them 
A)  gravity 
B)  electrostatic forces 
C)  magnetism 
D)  all of them

Question 3

Body density can be used to determine the amount of fat carried by an individual because the density of muscle is greater than that of fat.

Accepted Answer

A) True 
 B)False

Question 4

The number 6730.0 contains five significant figures.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is an SI unit?

Accepted Answer

A)  gram 
B)  liter 
C)  meter 
D)  calorie 
A)  gram 
B)  liter 
C)  meter 
D)  calorie

Question 6

If 13% of a class cheats on an exam and there are 93 students in the class,how many students should you recommend be expelled (to the nearest whole student)?

Accepted Answer

A)  9 
B)  10 
C)  12 
D)  15 
A)  9 
B)  10 
C)  12 
D)  15

Question 7

Molarity (M)is calculated as:   
 .M would be considered a derived unit.

Accepted Answer

A) True 
 B)False

Question 8

A molecule represented by O-O-O must be classified as

Accepted Answer

A)  homoatomic and polyatomic. 
B)  homoatomic and monoatomic. 
C)  heteroatomic and polyatomic. 
D)  heteroatomic and monoatomic. 
A)  homoatomic and polyatomic. 
B)  homoatomic and monoatomic. 
C)  heteroatomic and polyatomic. 
D)  heteroatomic and monoatomic.

Question 9

Based on data obtained in an experiment,to determine the density of a metal,the following calculation is carried out.Express the answer to the correct number of significant figures.

Accepted Answer

A)  2.1 g/mL 
B)  2.14 g/ml 
C)  2.142 g/mL 
D)  2.1423 g/mL 
A)  2.1 g/mL 
B)  2.14 g/ml 
C)  2.142 g/mL 
D)  2.1423 g/mL

Question 10

A patient with a body temperature of 300 K would be considered as suffering from hypothermia.

Accepted Answer

A) True 
 B)False

Question 11

How is the weight of an object influenced when the gravitational force on the object is increased?

Accepted Answer

A)  it decreases 
B)  it increases 
C)  it is unchanged 
D)  it equals the mass 
A)  it decreases 
B)  it increases 
C)  it is unchanged 
D)  it equals the mass

Question 12

Which number has the greatest number of significant digits?

Accepted Answer

A)  1.0035 
B)  17.5000 
C)  0.0000625 
D)  6.022 * 1023 
A)  1.0035 
B)  17.5000 
C)  0.0000625 
D)  6.022 * 1023

Question 13

Which of the following set-ups will allow you to calculate the cost of fruit in dollars per gram,if the price is given as 0.79 dollars per pound?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
A) 
  
B) 
  
C) 
  
D)

Question 14

The number twelve,representing a dozen,has two significant figures.

Accepted Answer

A) True 
 B)False

Question 15

Do the following calculation and express the answer using the correct number of significant figures.
______ = (1.21 *10-3 + 1.3 *10-3)* 6.453 *102

Accepted Answer

A)  1.619 
B)  2 
C)  1.6 
D)  1.62 
A)  1.619 
B)  2 
C)  1.6 
D)  1.62

Question 16

A scientific model is an explanation for observed behavior.

Accepted Answer

A) True 
 B)False

Question 17

If a student completes 5 problems out of a total of 8 on a pop quiz,what percentage of the quiz was completed?

Accepted Answer

A)  0.625 
B)  6.25 
C)  16.0 
D)  62.5 
A)  0.625 
B)  6.25 
C)  16.0 
D)  62.5

Question 18

If urine has a density of 1.08 g/mL,what would be the mass of a 125 mL urine sample?

Accepted Answer

A)  135 g 
B)  0.00864 g 
C)  116 g 
D)  125 g 
A)  135 g 
B)  0.00864 g 
C)  116 g 
D)  125 g

Question 19

On a cold winter day the weather report gives the temperature as -5.0° F.What would this temperature be if reported on the Kevin scale?

Accepted Answer

A)  252 K 
B)  258 K 
C)  268 K 
D)  -20.6 K 
A)  252 K 
B)  258 K 
C)  268 K 
D)  -20.6 K

Question 20

Which of the following consists of a single chemical species?

Accepted Answer

A)  solution 
B)  homogeneous mixture 
C)  heterogeneous mixture 
D)  compound 
A)  solution 
B)  homogeneous mixture 
C)  heterogeneous mixture 
D)  compound

Exam 1: Matter, measurements, and Calculations

Which of the following substances are composed of heteroatomic molecules?

Any two objects are attracted to each other by _____ .

Body density can be used to determine the amount of fat carried by an individual because the density of muscle is greater than that of fat.

The number 6730.0 contains five significant figures.

Which of the following is an SI unit?

If 13% of a class cheats on an exam and there are 93 students in the class,how many students should you recommend be expelled (to the nearest whole student)?

Molarity (M)is calculated as: .M would be considered a derived unit.

A molecule represented by O-O-O must be classified as

Based on data obtained in an experiment,to determine the density of a metal,the following calculation is carried out.Express the answer to the correct number of significant figures.

A patient with a body temperature of 300 K would be considered as suffering from hypothermia.

How is the weight of an object influenced when the gravitational force on the object is increased?

Which number has the greatest number of significant digits?

Which of the following set-ups will allow you to calculate the cost of fruit in dollars per gram,if the price is given as 0.79 dollars per pound?

The number twelve,representing a dozen,has two significant figures.

Do the following calculation and express the answer using the correct number of significant figures. ______ = (1.21 *10-3 + 1.3 *10-3)* 6.453 *102

A scientific model is an explanation for observed behavior.

If a student completes 5 problems out of a total of 8 on a pop quiz,what percentage of the quiz was completed?

If urine has a density of 1.08 g/mL,what would be the mass of a 125 mL urine sample?

On a cold winter day the weather report gives the temperature as -5.0° F.What would this temperature be if reported on the Kevin scale?

Which of the following consists of a single chemical species?

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids,bases,and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

Do the following calculation and express the answer using the correct number of significant figures. ______ = (1.21 10^-3 + 1.3 10^-3)* 6.453 *10²