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Definitions
Counting atoms #1
Counting atoms #2
Counting atoms #3
Subscripts, Parentheses, Coefficients
100

What are the 2 ways an element can be shown in a chemical formula. 

With only a capital letter or a capital and a lowercase letter


100

How many total atoms are represented in the formula shown below?

C2H5OH

9 total atoms

100

True or False?

Formula B has 7 more atoms than formula A.


Formula A: 

CH(NaO3)

Formula B:

2 Al2(SO4)3

True

100

Which of the following chemical formulas contains 7 total atoms?

A) Fe(OH)3

B) Au(CN)2

C) Ti(OH)4

A

100

List your elements and count your atoms.

4Al(OH)3

Al- 4

O- 12

H- 12

200

What is the subscript?

The small number behind an element that tells us how many atoms of that element there are.

200

How many elements are present in the following formula?

CH3COOH

3 total atoms

200

True or False?

Ferrocene has 10 more atoms than diacetyl.


Ferrocene Diacetyl

(C5H5)2Fe 


Diacetyl

(CH3CO)2

False, it has 9 more

200

Which of the following compounds is made up of the most atoms?

Radon Acetate: Rn(CH3COO)2

Cobalt(II) Nitrate: Co(NO3)2

Scandium Sulfate: Sc2(SO4)

Scandium Sulfate

200

List your elements and count your atoms.

5Al2(Si2O3)2

Al- 10

Si- 20

O- 30

300

What is the coefficient?

The big number at the beginning of a chemical formula, that gets multiplied to everything behind it.

300

Which of the following chemical formulas contains 8 total atoms?

A) C2H5OH

B) NH4NO3

C) C2H4O2

C) C2H4O2

300

How many atoms of each element are in one molecule of the compound shown below?

Fe(H2O)4(OH)2

iron = 1; hydrogen = 10; oxygen = 6

300

Which chemical formula shown below contains the fewest oxygen atoms?


I. K2SO4

II. H2O2

III. Ca(C2H3O2)2

Formula 2

300

List your elements and count your atoms.

5Mg3(PO4)2

Mg- 15

P- 10

O- 40

400
What are the 3 parts to a chemical equation?

Reactants

Arrow 

Products

400

How many atoms of each element are in one molecule of copper(II) phosphate?


Cu3(PO4)2

copper = 3 

phosphorus = 2

oxygen = 8

400

Which chemical formula shown below contains the most hydrogen atoms?

Formula X = Ba(OH)2

Formula Y = (NH4)2SO4

Formula Z = Co(OH)2

Formula Y

400

How many atoms of each element are in one molecule of the compound shown below?


Fe(H2O)4(OHFe)2

Fe- 3

H- 10

O- 6

400

List your elements and count your atoms.

5Al(C2H3O2)2

Al- 5

C- 20

H- 30

O- 20


500
What is the Law of Consevation of Mass?

The law that states in a chemical formula, what is on one side of the arrow has to also be on the other side.

500

How many more oxygen atoms are represented in formula I than in formula II?

Formula I:

Fe(NO3)2


Formula II:

3 Fe(OH)3

3

500

How many atoms are represented in the formula shown below?

Ni(CH3CO2)2

15 atoms

500

List the elements and count your atoms.

9MgSO4

Mg- 9

S- 9

O- 36

Total: 54

500

List your elements and count your atoms.

3(NH4)2Cr2O7

N- 6

H- 24

Cr- 6

O- 21