Question 1

If a 200 gram sample of water is partially frozen forming 40 g of ice, than 80% of the original sample is still a liquid.

Accepted Answer

A) True 
 B)False  True

Question 2

After heating, a pure substance, A, is found to produce both B and C. What can be said about the substance A?

Accepted Answer

A) It is an element 
B) It is a compound 
C) It is either an element or compound 
D) Impossible to predict 
A) It is an element 
B) It is a compound 
C) It is either an element or compound 
D) Impossible to predict B

Question 3

The prefix centi- denotes what fraction of a basic unit?

Accepted Answer

A) 1\10 
B) 1\100 
C) 1\1000 
D) 1000 
A) 1\10 
B) 1\100 
C) 1\1000 
D) 1000 B

Question 4

Express the following "generic number" in scientific notation.  0.0000XXX

Accepted Answer

A) XXX × 10-7 
B) X.XX × 105 
C) X.XX × 10-5 
D) X.XX × 10-4 
A) XXX × 10-7 
B) X.XX × 105 
C) X.XX × 10-5 
D) X.XX × 10-4

Question 5

Ethanol (ethyl alcohol)has a density of 0.789 g\mL at 25°C.   If 75.5 g of ethanol is needed for a reaction, what volume in mL should be added to the reaction container?

Accepted Answer

A) 95.7 mL 
B) 59.6 mL 
C) 0.0105 mL 
D) 78.9 mL 
A) 95.7 mL 
B) 59.6 mL 
C) 0.0105 mL 
D) 78.9 mL

Question 6

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 7

Which of the following terms correctly applies to a molecule of CO2?

Accepted Answer

A) triatomic, heteroatomic 
B) polyatomic, diatomic 
C) triatomic, homoatomic 
D) diatomic, heteroatomic 
A) triatomic, heteroatomic 
B) polyatomic, diatomic 
C) triatomic, homoatomic 
D) diatomic, heteroatomic

Question 8

Which of the following is an example of a homogeneous mixture?

Accepted Answer

A) NaOH solution 
B) mortar (mixture of water, sand and cement) 
C) vinegar and oil salad dressing 
D) more than one response is correct 
A) NaOH solution 
B) mortar (mixture of water, sand and cement) 
C) vinegar and oil salad dressing 
D) more than one response is correct

Question 9

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 10

The yard is considered a derived SI unit.

Accepted Answer

A) True 
 B)False

Question 11

Homoatomic pure substances are known as _____ .

Accepted Answer

A) protons 
B) elements 
C) compound 
D) molecules 
A) protons 
B) elements 
C) compound 
D) molecules

Question 12

Which of the following represents a physical change in matter?

Accepted Answer

A) A substance solidifies at 443 K. 
B) A substance produces a gas and a solid when heated. 
C) A substance burns when heated. 
D) A substance changes color when exposed to air. 
A) A substance solidifies at 443 K. 
B) A substance produces a gas and a solid when heated. 
C) A substance burns when heated. 
D) A substance changes color when exposed to air.

Question 13

One advantage of the Kelvin system is that it is impossible to have temperatures below zero.

Accepted Answer

A) True 
 B)False

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 correct scientific notation.   ______ = (2.97 × 102)× (6.09 × 10 − 7)

Accepted Answer

A) 5.53 × 103 
B) 1.81 × 10 − 4 
C) 4.88 × 108 
D) 2.05 × 10 − 9 
A) 5.53 × 103 
B) 1.81 × 10 − 4 
C) 4.88 × 108 
D) 2.05 × 10 − 9

Question 16

Which of the following is a physical property of matter?

Accepted Answer

A) it does not burn 
B) produces a gas when placed in an acid 
C) freezes at − 10 ° F 
D) the surface turns black in air 
A) it does not burn 
B) produces a gas when placed in an acid 
C) freezes at − 10 ° F 
D) the surface turns black in air

Question 17

Identify a true statement of matter. ​

Accepted Answer

A) Matter is a measurement of gravitational force acting on an object. 
B) Matter is anything that has mass and occupies space. 
C) The amount of matter in an object varies in different locations. 
D) Matter is a measurement of mass in an object. 
A) Matter is a measurement of gravitational force acting on an object. 
B) Matter is anything that has mass and occupies space. 
C) The amount of matter in an object varies in different locations. 
D) Matter is a measurement of mass in an object.

Question 18

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 19

A furnace delivers 8.0 × 104 BTU per hour. How many kilocalories per hour is this? (hint: 1 cal = 0.00397 BTU)

Accepted Answer

A) 3.2 × 10 − 5 kcal 
B) 3.2 × 102 kcal 
C) 2.0 × 104 kcal 
D) 2.5 × 102 kcal 
A) 3.2 × 10 − 5 kcal 
B) 3.2 × 102 kcal 
C) 2.0 × 104 kcal 
D) 2.5 × 102 kcal

Question 20

The mass of an object is

Accepted Answer

A) the force between the object and the earth. 
B) a measure of the amount of matter in the object. 
C) the amount of space the object occupies. 
D) depends on the location of the object on the earth. 
A) the force between the object and the earth. 
B) a measure of the amount of matter in the object. 
C) the amount of space the object occupies. 
D) depends on the location of the object on the earth.

Exam 1: Matter, Measurements, and Calculations

If a 200 gram sample of water is partially frozen forming 40 g of ice, than 80% of the original sample is still a liquid.

After heating, a pure substance, A, is found to produce both B and C. What can be said about the substance A?

The prefix centi- denotes what fraction of a basic unit?

Express the following "generic number" in scientific notation. 0.0000XXX

Ethanol (ethyl alcohol)has a density of 0.789 g\mL at 25°C. If 75.5 g of ethanol is needed for a reaction, what volume in mL should be added to the reaction container?

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.

Which of the following terms correctly applies to a molecule of CO2?

Which of the following is an example of a homogeneous mixture?

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

The yard is considered a derived SI unit.

Homoatomic pure substances are known as _____ .

Which of the following represents a physical change in matter?

One advantage of the Kelvin system is that it is impossible to have temperatures below zero.

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

Do the following calculation and express the answer using correct scientific notation. ______ = (2.97 × 102)× (6.09 × 10 − 7)

Which of the following is a physical property of matter?

Identify a true statement of matter. ​

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 furnace delivers 8.0 × 104 BTU per hour. How many kilocalories per hour is this? (hint: 1 cal = 0.00397 BTU)

The mass of an object is

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

Which of the following terms correctly applies to a molecule of CO₂?

Do the following calculation and express the answer using correct scientific notation. ______ = (2.97 × 10²)× (6.09 × 10^{− 7})

Identify a true statement of matter.

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 furnace delivers 8.0 × 10⁴ BTU per hour. How many kilocalories per hour is this? (hint: 1 cal = 0.00397 BTU)