Chem 101 Final

Things that are "givens"

Which of the following is the BEST option for order of steps for scientific method?

A) Ask a question, analyze results, make a hypothesis, test the hypothesis, draw conclusions, communicate results.

B) Ask questions, make a hypothesis, test the hypothesis, analyze results, draw conclusions, communicate results.

C) Make a hypothesis, test the hypothesis, analyze the results, ask a question, draw conclusions, communicate results.

D) Ask a question, make a hypothesis, test hypothesis, draw conclusions, analyze results, communicate results.

B

Question 2: The process of obtaining information by using the senses is called a/an

A) scientific method

B) observation

C) inquiry

D) conclusion

B

If the parking lot for MSJC is almost empty, then it means that students are not enrolled in the in-person classes. The

above statement is an example of:

A)hypothesis

B)law

C)experiment

D)theory

E)observation

A

What step in scientific research is used to prove a hypothesis right or wrong, and to formulate scientific theories?

A) problem

B) conclusion

C) experiment

D) analysis of data

C

Which of the following is considered true and is universally accepted under specific conditions?

A) Law

B) theory

C) hypothesis

D) scientific research

A

Which of the following correctly identifies a difference between a scientific theory and a law?

A) Laws are often contributed to by multiple scientists over many years, whereas theories are not.

B) Laws are a concise statement whereas a theory explains how or why something occurs.

C) There are more laws than theories.

D) Theories are more correct than laws

B

Which of the following is generally accepted as true?

A) Only Theory

B)Only experiments

C)Observations and Experiments

D)Laws and theories

E)Only hypothesis

D

Which of the following is not a requirement of scientific research?

A) It must be peer-reviewed by other specialists in the field.

B) It includes careful experimentation

C) It includes repeated trials or tests

D) They do not provide an explanation into how or why something occurs.

C

Which of the following is a heterogeneous mixture?

A) a boba thai tea with tapioca pearls

B) Air

C)table salt, NaCl

D)distilled water

A

Which of the following is a homogeneous mixture?

A) a boba thai tea with tapioca pearls

B)air

C)table salt, NaCl

D)distilled water, H,O

D

How many significant figures are present in 0.00350

A) 0

B) 2

C) 3

D) 4

E) 5

C

The answer to the multiplication question 42.5 × 0.10 should have how many significant figures?

A) 1

B) 2

C) 3

D) 0

B

The answer to the subtraction 1.65 - 0.2 should be:

A)1.45

B)1.4

C)1.46

D)1.5

E)1.50

A

A sample of wood with a mass of 3.0 grams was burned in an open dish. The ashes weighed 1.2 grams. What happened to the rest of the wood?

A) The remaining mass was destroyed

B) The remaining 1.8 grams was converted into gaseous compounds

C) Nothing, the burned wood simple has a mass of 1.2 grams

D) None of the above

B

Which one of the following represents a chemical change?

A) Mercury (II) oxide is heated to and form mercury metal and oxygen gas

B) Rubbing alcohol evaporates

C) Iodine vapor deposits on a surface

D) Iorn metal is separated from sand using a magnet

E) Rock salt is pulverized

A

Baking soda (NaHCO₃) can be classified as

A) Element

B) Compound

C) homogenous mixture

D) heterogeneous mixture

B

Identify the Metalloid from the following

A) Na

B) Mg

C) Al

D) Si

E) P

D

Write the name of the alkaline earth metal in the 5th period

A) Rubidium

B) Strontium

C) Cadmium

D) Antimony

E) Nitrogen

B

What is the atomic number of an ion that has a charge of -2 and has 10 electrons

A) 6

B) 8

C) 10

D) 12

E) 16

B

Which of the following statments are true of the law of conservation of energy?

A) Energy can be created or destroyed

B) energy cannot be created, but only destroy destroyed

C) energy cannot be destroyed, but only created

D) energy can neither be created nor destroyed

D

Empirical formula

A) the least amount of numbers it can be

B) the right amount of numbers

A

Molecular formula

A) the least amount of numbers it can be

B) the right amount of numbers

B

What does Bohr model represent

A) The structure of molecules

B) The structure of the solar system

C) The structure of the atom

D) The structure of the element

C

The maximum number of electrons that can be accommodated in a sublevel for which l=2 is

A) 2

B) 10

C) 6

D) 14

E) 8

B

Which of the following has the largest radius

A) Na

B) Mg

C) Al

D) Cl

A

Which of the following has the smallest radius

A) Mg

B) Ca

C) Sr

D) Ba

A

Which is most electronegitive

A) Na

B) Mg

C) Al

D) Cl

D

Which is the most metallic

A) Mg

B) Ca

C) Sr

D) Ba

D

The maximum number of electrons that can be accommodated in a sublevel for which l=2 is

A) 2

B) 10

C) 6

D) 14

E) 8

B

Which of the following intermolecular forces are present in all molecules?

A) dispersion forces

B) dipole-dipole interactions

C) hydrogen bonding

A

Ideal Gas law

PV = nRT

Henre’s Law

he amount of dissolved gas in a liquid is directly proportional at equilibrium to its partial pressure above the liquid.

Law of partial pressure

P_total = P₁+P₂+P_{3 …}

For a gas, which pair of variables are inversely proportional to each other (if all other conditions remain constant)? (Arrange the ideal gas law to figure out the answer)

A) P, V

B) V, T

C) n, P

D) P, T

E) n, V

A

Which is the most polar bond?

A) C-H
B) N-H
C) O-H
D) Se-H

C

Which of the following molecular geometries (shapes) are always polar?

A) linear

B) trigonal planer

C) tetrahedral

D) trigonal pyramidal

E) bent

D and E

What is the mass number of the most abundant form of oxygen atom?
A) 15.9994

B) 8

C) 16

D) 24

E) 32

C

What does the symbol C-12 mean?

A) the melting point of carbon is 12°C

B) the carbon atom weighs 12 amu

C) the carbon atom weighs 12 grams

D) the carbon atom weighs 12 pounds

B

What is the element symbol for an atom that has 11 protons and 12 neutrons?

A) H

B) Na

C) C

D) B

B

What is the element symbol that is in Period 4, and Group IIA(2) of the periodic table?

A) Ti

B) Ca

C) C

D) Zn

B

Which element is listed as the first one in Group IVA (14) of the periodic table?

A) Ti

B) Sc

C) Na

D) C

D

Which of the following particles are in the nucleus of an atom?

A) protons and electrons

B) protons only

C) neutrons only

D) protons and neutrons

D

List the three statements that describe the modern atomic theory.

A) Atoms can be created

B) Atoms combine in whole-number ratios to form compounds

C) Atoms can be broken into smaller pieces

D) Atoms of different elements are different

E) All matter is composed of atoms

F) Atoms can be destroyed

B, D, and E

Typically, metals

A) gain electrons
B) lose electrons

B