Chapter 9

Question 1

What are the diatomic molecules (HOFBrINCl)

Answer 1

Hydrogen, Oxegyn, Florine, Bromine, Iodine, Nitrogen, Chlorine

Question 2

The diatomic molecules are usually found in what state

Answer 2

gasses

Question 3

which two diatomic molecules are not gasses and what is their state of matter

Answer 3

Iodine (s) and Bromine (l)

Question 4

Compounds can either be

Answer 4

aqueous or solid

Question 5

If an element is not diatomic and not a noble gas it is usually a

Answer 5

solid

Question 6

which non diatomic elements are not solids

Answer 6

Hg (l) and S (g)

Question 7

an arrow means

Answer 7

produces

Question 8

two arrows means

Answer 8

can be uncombined

Question 9

+

Answer 9

reacts

Question 10

triangle above arrow

Answer 10

heated

Question 11

temp or pressure above arrow

Answer 11

specific temp or pressure in which reaction is carried out

Question 12

cat above arrow means a catalyst is needed. What is a catalyst

Answer 12

a substance needed to initiate a reaction

Question 13

NR means

Answer 13

no reaction takes place

Question 14

an up arrow means

Answer 14

gaseous product

Question 15

a down arrow means

Answer 15

formation of a precipitant

Question 16

on the left of the arrow is the

Answer 16

reactants

Question 17

on the right of the arrow is the

Answer 17

products

Question 18

chemical reactions occur when substances

Answer 18

undergo changes

Question 19

bonds are broken and new bonds are formed, the atoms are rearranged but never

Answer 19

created or destroyed- law of conservation of mass

Question 20

balanced chemical equations represent a

Answer 20

chemical reaction

Question 21

what is a coefficiant

Answer 21

a number put in front of an element or compound used to balance it

Question 22

what is a subscript

Answer 22

a number below an element or compound showing its number

Question 23

what are the four ways we can identify a chemical change has occured

Answer 23

change of color, evolution of gas, formation of a precipitant, release or absorbtion of energy

Question 24

what are the five types of reactions

Answer 24

synthesis, decomposition, combustion, single displacement, double displacement

Question 25

in a synthesis reaction

Answer 25

two elements become a compound

Question 26

what type of reaction is this A + B = AB

Answer 26

synthesis

Question 27

in a decomposition reaction

Answer 27

a compound decomposes into two elements

Question 28

what type of reaction is this AB = A + B

Answer 28

decomposition

Question 29

in a combustion reaction

Answer 29

carbon reacts with oxegyn to form CO2 and H2O

Question 30

what type of reaction is this Carbon + Oxegyn = CO2 + H2O

Answer 30

combustion

Question 31

what is a single displacement reaction

Answer 31

when an element and compound become a different element and compound

Question 32

a single displacement reaction can only occur if the lone element is more _ than the one in the compound

Answer 32

reactive

Question 33

what type of reaction is A + BC = B + AC

Answer 33

single displacement

Question 34

what is a double displacement reaction

Answer 34

when two compounds become two different compounds

Question 35

how do we predict double displacement reactions

Answer 35

FOIL or inside with inside outside with outside

Question 36

what comes first in compounds

Answer 36

the positive

Question 37

what type of reaction is AB + CD = BC + AD

Answer 37

double displacement

Question 38

what do we call a reaction that hasn’t been balanced

Answer 38

a skeleton equation

Question 39

how do you know if a compound is ionic

Answer 39

it has a metal and a nonmetal

Question 40

if a compound is ionic you need to

Answer 40

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