Finals

Question 1

is a process in which at least one
substance is produced as a result of chemical change.

Answer 1

chemical reaction

Question 2

The substance that enter into a chemical reaction are
called

Answer 2

reactants

Question 3

substances formed from this
reaction are called .

Answer 3

products

Question 4

separates reactants from products; usually
read as ‘yields’.

Answer 4

arrow (→) -

Question 5

• separates individual substances in each
  side

Answer 5

plus sign (+)

Question 6

• denotes a reaction in equilibrium

Answer 6

double arrow (⇌)

Question 7

state of compound or molecules -

Answer 7

(s) solid, (l) liquid, (g)
gas, and (aq) aqueous

Question 8

What are the different
types of chemical
reactions?

Answer 8

Synthesis Reactions
Decomposition Reactions
Single Displacement Reactions
Double Displacement Reactions
Combustion Reactions

Question 9

Combination reactions
• Reactions where two or more simple substances
(generally elements) combine to form new compoun

Answer 9

Synthesis Reactions

Question 10

A compound is broken down into simpler compounds or
even its starting elements

Answer 10

Decomposition Reactions

Question 11

Decomposition of a compound is possible through the
application of either

Answer 11

heat, energy, a catalyst, or a
combination of these.

Question 12

One element replaces a similar element in the compound

Answer 12

Single Displacement Reactions

Question 13

occurs when two ionic substances react and exchange
ions with one another

Answer 13

Double Displacement Reactions

Question 14

Two types of double displacement reactions

Answer 14

acid-base reactions
precipitation reactions

Question 15

Acid-base reactions or neutralization reactions

Answer 15

Combinations of an acid and a base forming a salt and
water

Question 16

Happen when the cation of one compound combines with the
anions of another compound, forming an insoluble solid
known as a precipitate

Answer 16

Precipitation Reactions

Question 17

Substance reacts with oxygen gas, releasing a large
amount of energy in the form of light and heat

Answer 17

Combustion Reactions

Question 18

are rapid
reactions. These reactions often
produce flames and give off heat,
releasing carbon dioxide and
water.

Answer 18

Combustion reactions

Question 19

are a combination of two or
more simple substances to form compounds.

Answer 19

Synthesis reactions

Question 20

happen when a
compound is broken down into simpler substances
(usually their elements).

Answer 20

Decomposition reactions

Question 21

are reactions wherein one
element substitutes another element in a compound

Answer 21

Single displacement reactions

Question 22

happen when two
compounds exchange ions with another.

Answer 22

Double displacement reactions

Question 23

occurs when a substance is made
to react with oxygen gas with the application of heat.

Answer 23

Combustion reaction

Question 24

(the starting compounds) - the left side

Answer 24

reactants

Question 25

(the final compounds) - the right side

Answer 25

products

Question 26

- part of the chemical formula of reactants and products

Answer 26

Subscript

Question 27

- placed in front of formulas to indicate number of molecules of the substance

Answer 27

Coefficients

Question 28

Atoms are neither created nor destroyed; they are conserved and are rearranged in the reaction

Answer 28

Law of Conservation of Mass

Question 29

since identities of reactants and products do not change, thus equation cannot be balanced by changing the subscripts, but by changing .

Answer 29

coefficients

Question 30

has equal number of atoms per species involved in reaction on both reactant and product sides.

Answer 30

balanced chemical equation