Mole & Chemical Reactions Review

Question 1

diatomic molecules

Answer 1

hydrogen, nitrogen, oxygen, flourine, chlorine, bromine, iodine

Question 2

diatomic molecules are…

Answer 2

molecules that appear with 2 naturally

Question 3

moles to grams

Answer 3

multiply by molar mass

Question 4

grams to moles

Answer 4

divide by molar mass

Question 5

moles to liters

Answer 5

multiply by 22.4

Question 6

liters to moles

Answer 6

divide by 22.4

Question 7

moles to particles

Answer 7

multiply by 6.02 * 10^23

Question 8

particles to moles

Answer 8

divide by

Question 9

atoms to grams STEPS

Answer 9

atoms to moles to grams

Question 10

grams to atoms STEPS

Answer 10

grams to moles to atoms

Question 11

chemical reaction

Answer 11

occurs when two or more substances are changed into different substances

Question 12

chemical equation

Answer 12

represents via symbols and formulas, the identities and relative molecular/molar amounts of reactants and products in a chemical equations

Question 13

indications of chemical reactions

Answer 13

a) evolution of energy as heat/light
b) production of a gas
c) formation of a precipitate
d) color change

Question 14

characteristic of chemical equations

Answer 14

1) equation must represent known facts
2) equation must contain correct formulas for reactants and products
c) law of conservation of mass must be satisfied - use coefficients

Question 15

coefficents

Answer 15

a small whole number that appears in front of a formula in a chemical equation

Question 16

word equation

Answer 16

reactants and products represented via words

Question 17

formula equation

Answer 17

reactants and products of a chemical equation represented symbols and formulas

Question 18

balanced formula equation

Answer 18

uses coefficients to allow conservation of mass

Question 19

word equation example

Answer 19

iron II phosphate reacts with aluminum nitrate to produce iron II nitrate and aluminum phosphate

Question 20

formula equation example

Answer 20

Fe3(PO4)2 + Al(NO3)3 → Fe(NO3)2 + AlPO4

Question 21

balanced formula equation example

Answer 21

Fe3(PO4)2 + 2 Al(NO3)3 → 3 Fe(NO3)2 + 2 AlPO4

Question 22

->

Answer 22

yields, produces

Question 23

(s)

Answer 23

solid

Question 24

(l)

Answer 24

liquid

Question 25

(aq)

Answer 25

aqueous

Question 26

(g)

Answer 26

gas

Question 27

rules for balancing

Answer 27

1) identify the names of reactants and products, write equation
2) use coefficients to balance according to LoCoM
3) first balance atoms that appear only once
4) balance polyatomic ions that appear on both sides as single units
5) balance h and o atoms after everything else has been balanced
6) count to make sure everything is balanced

Question 28

synthesis reaction

Answer 28

combination reaction, two or more substances combine to form a new compound

A + B –> AB

Question 29

decomposition reaction

Answer 29

a single compound that undergoes a reaction that produces two or more simpler substances

AB –> A + B

Question 30

single displacement reaction

Answer 30

replacement reaction, one element replaces a similar element in a compound
- metal replaces metal
- only higher reactivity can replace

A + BX –> AX + B

Question 31

double displacement reaction

Answer 31

double replacement reaction, the ions of two compounds exchange places in an aqueous solution to form two new compounds

AX + BY –> AY + BX

Question 32

combustion reaction

Answer 32

a substance combines with oxygen, releasing a large amount of energy in the form of light and heat

CxHy + O2 —> CO2 + H2O
C10H8 + 12 O2 → 10 CO2 + 4 H2O