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chemical formula

Total questions: 63

Worksheet time: 55mins

Name
Class
Date
1.

The formula of copper(II) oxide is

a)

CuO

b)

Cu2O

c)

CuO2

2.

The formula of sulphuric acid is

a)

HSO4

b)

H2SO4

c)

H2SO3

d)

H2SO3

3.

The formula of iron(III) oxide is

a)

FeO

b)

FeO2

c)

Fe2O

d)

Fe2O3

4.

The formula of magnesium chloride is

a)

MgCl

b)

MgCl2

c)

MgCl3

5.

The formula of calcium hydroxide is

a)

CaOH

b)

Ca(OH)2

c)

Ca(OH)3

6.

The formula of sodium carbonate is

a)

NaCO3

b)

Na(CO3)2

c)

Na2CO3

7.

The formula of iron(II) hydroxide is

a)

FeOH2

b)

FeOH

c)

Fe(OH)2

d)

Fe(OH)3

8.

The formula of ammonium ion is

a)

NH3

b)

NH3+

c)

NH4

d)

NH4+

9.

The name of Cu(OH)2 is

a)

copper hydroxide

b)

copper(I) hydroxide

c)

copper(II) hydroxide

10.

The formula of silver nitrate is

a)

AgNO3

b)

Ag2NO3

c)

Ag(NO3)2

11.

The formula of sodium sulphate is

a)

NaSO4

b)

Na2SO4

c)

Na(SO4)2

d)

Na2(SO4)3

12.

Which of the following formula is NOT an acid?

a)

HCl

b)

HNO3

c)

H2SO4

d)

NH3

13.

Which of the following formula is NOT a salt

a)

NaCl

b)

KNO3

c)

PbSO4

d)

CaO

14.

Which of the following is a strong alkali?

a)

Cu(OH)2

b)

Fe(OH)2

c)

Al(OH)3

d)

NaOH

15.

How many atoms of sulfur are in each molecule of H2SO4?

a)

1

b)

4

c)

2

d)

7

16.

Alanine is an amino acid with formula C3H7NO2. How many atoms in all are in each molecule of alanine?

a)

3

b)

7

c)

12

d)

13

17.

Which of the following statements accurately describes the number of atoms in a molecule of ammonia (NH3)?

a)

Three atoms of nitrogen and three atoms of hydrogen

b)

One atom of nitrogen and three atoms of hydrogen

c)

Three atoms of nitrogen and one atom of hydrogen

d)

One atom of nitrogen and one atom of hydrogen

18.

Which of the following accurately describes the chemical formula of the molecule shown above?

a)

3CH8O

b)

C3H7O

c)

C4H8O2

d)

C3H8O

19.

Which elements are in the formula shown above?

a)

Tin and Chlorine

b)

Tin, Carbon and Lithium

c)

Sulfur, Nitrogen and Chlorine

d)

Sulfur, Nitrogen, Carbon and Lithium

20.

Which elements are in the formula shown above?

a)

Antimony only

b)

Carbon and Sulfur

c)

Cesium only

d)

Carbon and Silicon

21.

Which elements are in the formula shown above?

a)

Cobalt only

b)

Carbon and Oxygen

c)

Copper only

d)

Carbon and Osmium

22.

Based on the diagrams, which compound should be identified as methane (CH4)?

a)

Molecule 1

b)

Molecule 3

c)

Molecule 4

d)

Molecule 6

23.

Based on the diagram of molecule 5, what is the identity of the compound?

a)

Hydrogen peroxide (H2O2)

b)

Hydronium (H3O+)

c)

Hydroxide (OH-)

d)

Water (H2O)

24.

How many atoms of carbon are in the formula CH3CH2CH2OH?

a)

3

b)

1

c)

7

d)

4

25.

How many atoms of hydrogen are in the formula CH3CH2Br?

a)

5

b)

3

c)

2

d)

7

26.

How many atoms of oxygen are in the formula HOOCCOOH?

a)

2

b)

4

c)

8

d)

1

27.

Which of the following chemical formulas contains exactly 4 hydrogen atoms?

a)

CH3COONa

b)

NH4OH

c)

CH3CH2Cl

d)

CH3CHO

28.

Which of these formulas contain equal numbers of nitrogen atoms?

a)

Formulas I and III

b)

Formulas I and IV

c)

Formulas I, II and V

d)

Formulas II and III

29.

How many atoms are represented in the reactants in the equation?

a)

6

b)

7

c)

4

d)

5

30.

The chemical formula for sodium sulfate is Na2SO4. How many sulfur atoms are in the formula for sodium sulfate?

a)

1

b)

2

c)

6

d)

7

31.

How many atoms of oxygen are in a molecule of glucose (C6H12O6)?

a)

4

b)

6

c)

12

d)

24

32.

Which of the models best represents CaCO3?

a)
b)
c)
d)
33.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

34.

What is the total number of oxygen atoms in Ca3(PO4)2?

a)

2

b)

4

c)

6

d)

8

e)

40

35.

Na2CO3 represents

a)

Sodium bicarbonate

b)

Sodium carbonate

c)

Sodium Chloride

d)

Calcium Carbonate

36.
NaCl represents 
a)
Sodium bicarbonate
b)
Sodium carbonate
c)
Sodium Chloride
d)
Calcium Carbonate
37.
NaOH represents 
a)
Sodium bicarbonate
b)
Sodium carbonate
c)
Sodium Chloride
d)
Sodium Hydroxide
38.

CaCO3 represents

a)

Sodium bicarbonate

b)

Sodium carbonate

c)

Sodium Chloride

d)

Calcium Carbonate

39.
HCl represents 
a)
Sulphuric Acid
b)
Hydrochloric Acid
c)
Nitric acid
d)
Chlorine gas
40.
MgO represents 
a)
Magnesium  Hydroxide
b)
Magnesium  Chloride
c)
Magnesium Oxide
d)
Sodium Nitrate
41.

NaNO3 represents

a)

Sodium Hydroxide

b)

Sodium Chloride

c)

Sodium Nitrite

d)

Sodium Nitrate

42.

Chemical Formula used for Aluminium oxide is

a)

AlO

b)

Al2O3

c)

AlO4

d)

AlO2

43.
Chemical Formula used for Aluminium  Chloride is
a)
AlCl2
b)
Al2Cl
c)
AlCl3
d)
AlCl
44.
NaCl  is 
a)
Base
b)
Acid
c)
salt
45.
Element or compound?
H2O
a)
element
b)
compound
46.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
47.
Element or compound?
H2O
a)
element
b)
compound
48.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
49.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
50.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
51.
What carries no charge 
a)
Neutrons
b)
Electrons
c)
Protons
52.
Which of the following is a positively charged subatomic particle found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
53.
The blue atoms are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
54.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
55.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
56.
Na + MgF2 -->  NaF + Mg
What are the reactants?
a)
Na + MgF2
b)
Na
c)
NaF + Mg
d)
NaF
57.
In this image, the symbols to the right of the arrow (in black) are called the_______.
a)
Products
b)
Reactants
c)
Subscripts
d)
Coefficients
58.
NH3 ---> N2 + H2
What are the products?
a)
N2 + H2
b)
N2
c)
H2
d)
NH3
59.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
60.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
61.
In this compound structure of alcohol, how many Hydrogen atoms are there?
a)
2
b)
4
c)
6
d)
8
62.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
63.
Which of the following statements is true about the molecule below?
2NaC2H3O2
a)
There are 3 Nitrogen atoms
b)
There are 2 Carbon atoms
c)
There are 6 Hydrogen atoms
d)
There are 2 Oxygen atoms

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