Chemistry Final

Front 1

TorF: Two different elements can have the same number of protons in the atom's nuclues.

Back 1

False

Front 2

TorF: The molar mass of ethylene (C2H4) is 40.065 g/mol

Back 2

False

Front 3

TorF: The molar mas of K2HPO4 is 154.174 g/mol

Back 3

False

Front 4

TorF: The terms vaporization and evaporation refer to the same process.

Back 4

False, vaporization turns something into gas while evaporation is a type of vaporization

Front 5

TorF: If the pressure remains constant, the high the temperature, the more likely the substance is to be in the gas phase rather than the liquid phase.

Back 5

True, as the temperature keeps getting higher the substance would keep going to the right on the phase diagram

Front 6

TorF: Intermolecular forces in a substance become stronger at higher temperatures

Back 6

False,

Front 7

TorF: Adding heat to a substance always causes its temperature to rise

Back 7

False, once a heat gets high enough it wont get any hotter

Front 8

TorF: Protons are positively charged and electrons are negatively charged

Back 8

True

Front 9

TorF: Endothermic reaction have negative enthalpy

Back 9

False

Front 10

TorF: The mass of an electron is extremely small compared to the mass of a proton

Back 10

True

Front 11

TorF: Elements in the modern periodic table are organized according to their mass number, not their atomic mass.

Back 11

False, they are organized by atomic mass

Front 12

TorF: The way that elements are arranged in the periodic table, the size of the atomic radius increases from left to right.

Back 12

False, it increases from top right to bottom left.

Front 13

TorF: The elements in the last column of the periodic table are called "noble" because they are able to form much stronger bonds than other elements

Back 13

False, they are noble because they don't bond with other elements

Front 14

TorF: Atoms with very different electro negativities can still form bonds

Back 14

True

Front 15

TorF: Atoms on the left side of the periodic table tond to form negative ions because they can easily gain electrons from neighboring atoms.

Back 15

False

Front 16

TorF: The VSEPR theory helps to determine the shape of molecules based on shared and unshared pairs of electrons.

Back 16

True

Front 17

TorF: Most ionic substances are brittle

Back 17

True

Front 18

TorF: Ionic substances that do not conduct electricity as solids, will not conduct electricity when they are dissolved.

Back 18

False

Front 19

TorF: Some ionic names are followed by a roman numeral to indicate the number of valence electrons involved.

Back 19

True

Front 20

TorF: Network covalent molecules resemble ionic compounds because of their ordered structures

Back 20

True

Front 21

TorF: An empirical formula for a molecule contains all the information you need to draw the structure for that molecule.

Back 21

False

Front 22

TorF: The size of a molecule is one factor in determining the strength of intermolecular attractions for that molecule.

Back 22

True

Front 23

TorF: The molecular formula of a molecule and its empirical formula cannot be the same.

Back 23

False

Front 24

TorF: We say that an equilibrium is reached when no more products or reactants are being formed.

Back 24

False

Front 25

TorF: Catalysts speed up reaction by lowering the activation energy.

Back 25

True

Front 26

TorF: In addition to speeding up chemical reactions, enzymes also get used up in the process

Back 26

False

Front 27

TorF: The definition for acids is the same according to Arrhenius and according to Bronsted-Lowry theory.

Back 27

True

Front 28

TorF: Gases have relatively high densities.

Back 28

False

Front 29

TorF: When applying gas laws, temperatures can be expressed in degree Celsius or in Kelvin.

Back 29

False

Front 30

TorF: Real gas molecules do not interact with each other.

Back 30

False

Front 31

TorF: Metals are typically brittle rather than ductile.

Back 31

False

Front 32

Sugar dissolving in water is a ______ change.

Back 32

Physical

Front 33

Wood burning is a _____ change.

Back 33

Chemical

Front 34

The components of a heterogeneous mixture are ______ distributed throughout.

Back 34

Not evenly

Front 35

Is heat absorbed or released when ice is melted?

Back 35

Absorbed

Front 36

Identify examples of endothermic processes.

Back 36

Photosynthesis

Front 37

How many neutrons does an oxygen atom have?

Back 37

8

Front 38

What is the mass number of the ferric ion Fe?

Back 38

52

Front 39

What is the atomic number of the ferric ion Fe?

Back 39

26

Front 40

What bond exists between Ca and O?

Back 40

Ionic

Front 41

What bond exists between O and N?

Back 41

Non-polar covalent

Front 42

Properties of ionic compounds do not include what?

Back 42

low melting temperatures

Front 43

Because proteins are made up of various amino acids, they are considered to be _____

Back 43

Copolymers

Front 44

Describe this reaction:
O + H2O ---> H202

Back 44

Combination

Front 45

Describe this reaction:
H2CO3 ---> H20 + CO2

Back 45

Decomposition

Front 46

Which of the following is not the goal of Green Chemistry?

Back 46

None of the above

Front 47

According to the Bronsted-Lowry definition of acids and bases.

Back 47

Bases are proton acceptors

Front 48

Is this a strong acid or strong base? HI

Back 48

Strong acid

Front 49

Is this a strong acid or strong base? LiOH

Back 49

Strong base

Front 50

The expression V/T =k describes ____

Back 50

Charles' law

Front 51

Which of these has no fixed volume and no fixed shape?

Back 51

Gases

Front 52

Which of these has both a fixed volume and a fixed shape?

Back 52

Solids