Free Printable Chemical formulae and equations

1.

What is the correct formula for the compound, lithium oxide?

a)

LiO

b)

Li₂O

c)

LiO₂

d)

Li₂O₂

2.

What is the ratio of iron atoms to oxygen atoms in the compound for rust (Fe₂O₃)?

a)

2:3

b)

3:2

c)

1:1

d)

2:5

3.

What is the chemical formula for tetrasulfur pentoxide?

a)

SO

b)

S₄O

c)

S₄O₅

d)

S₅O₄

4.

What do you call the substances on the left side of a chemical equation?

a)

yield

b)

products

c)

reactants

d)

compounds

5.

What is the molecular formula for barium chloride?

a)

BaCl2

b)

BaCl

c)

Ba2Cl

d)

BaCl3

6.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

7.

What is the chemical name of CaCl₂?

a)

Calcium dichloride

b)

Monocalcium dichloride

c)

Calcium chloride

d)

Calcium chlorine

8.

Aluminium reacts with oxygen to form aluminium oxide. Which of the following is the correct chemical formula for the oxygen reactant?

a)

O

b)

O^2-

c)

O₂

9.

What is the correct symbol for the element sodium?

a)

nA

b)

Na

c)

NA

10.

How many atoms of each element does a molecule of ammonia contain (NH3)?

a)

1 nitrogen atom and 3 hydrogen atoms

b)

3 nitrogen atoms and 3 hydrogen atoms

c)

1 nitrogen atom and 1 hydrogen atom

11.

What is the formula for ethane? It contains 2 carbon atoms and 6 hydrogen atoms.

a)

b)

c)

12.

a)

1

b)

2

c)

4

d)

6

13.

What is the formula for carbon dioxide?

a)

b)

c)

14.

What is the formula for nitrogen monoxide?

a)

b)

c)

15.

How many atoms of carbon (C) are in C₆H₁₂O₆?

a)

3

b)

6

c)

12

d)

24

16.

How many aluminium atoms are in Al₂O₃?

a)

3

b)

2

c)

5

d)

1

17.

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

18.

Chemical equations are used to represent _________________.

a)

reactions

b)

substances

c)

processes

d)

none of the above

19.

A ___________________ uses chemical formulas, plus signs, and an arrow to represent a chemical reaction

a)

chemical formula

b)

chemical equation

c)

element symbol

d)

inventory

20.

What is the chemical formula of Magnesium chloride?

a)

MgCl

b)

MgCl₂

c)

MgC

d)

MgC₂

21.

The formula shown here represents the breakdown of a metal into rust. What elements are involved in this reaction? Check all that apply. $4Fe\ +\ 3O_2\ \rightarrow\ 2Fe_2O_3$

a)

Iron

b)

Oxygen

c)

Carbon

d)

Nitrogen

22.

Which of the following is a chemical reaction?

a)

Sodium and chlorine atoms bond to form salt molecules.

b)

Ice melts to form water.

c)

Carbon dioxide freezes to form dry ice.

d)

Salt and water mix to form salt water.

23.

True/False: There are 2 reactants in the chemical equation below.
$KClO_3\ \rightarrow\ KCl\ +\ O_2$

a)

True

b)

False

24.

Translate the word equation below:

Nitrogen reacts with Hydrogen to form Ammonia (NH₃).

a)

$N\ \ \rightarrow\ H\ +\ NH_3$

b)

$N_2\ +\ H_2\ \rightarrow\ NH_3$

c)

$N\ +\ H\ \rightarrow\ NH_3$

d)

$N_2\ \rightarrow\ H_2\ +\ NH_3$

25.

Translate the word equation below.

Hydrogen and Carbon Dioxide react to form Carbonic Acid (H₂CO₃).

a)

$H\ +\ CO_2\ \rightarrow\ H_2CO_3$

b)

$H\ \rightarrow\ CO_2\ +\ H_2CO_{3_{ }}$

c)

$H_2\ +\ CO_2\ \rightarrow\ H_2CO_3$

d)

$H_2\ \rightarrow\ CO_2\ +\ H_2CO_3$

26.

Translate the word equation below.

Carbon Dioxide and Hydrogen react to form Methane (CH₄) and Water

a)

$CO_{2_{\ }}+\ H_2O\ \rightarrow\ CH_4\ +H_2\$

b)

$CO_2\ \rightarrow\ H_2\ +\ CH_4\ +\ H_2O$

c)

$CO_2\ \ +\ H_2\ +\ CH_4\ \ \rightarrow\ H_2O$

d)

$CO_2\ \ +\ H_2\ \rightarrow\ CH_4\ +\ H_2O$

27.

Translate the word equation below.

Sulfur Trioxide reacts with Water to form Sulfuric Acid (H₂SO₄).

a)

$SO_3\ +\ H_2O\ \rightarrow\ H_2SO_4$

b)

$SO_3\ \rightarrow\ H_2O\ +\ H_2SO_4$

c)

$SO_2\ +\ H_2O\ \rightarrow\ H_2SO_4$

d)

$SO\ \rightarrow\ H_2O\ +\ H_2SO_4$

28.

Translate the word equation below.

Aluminum and Hydrochloric Acid (HCl) react to form Aluminum Chloride and Hydrogen

a)

$Al\ +\ HCl\ \rightarrow\ AlCl_3\ \rightarrow\ H_2$

b)

$Al\ +\ HCl\ \rightarrow\ AlCl\ +\ H_2$

c)

$Al\ +\ HCl\ \rightarrow\ AlCl_3\ +\ H_2$

d)

$Al\ +\ HCl\ \rightarrow\ AlCl\ +\ H$

29.

Translate the word equation below.

Carbon Dioxide and Water react to form Glucose (C₆H₁₂O₆) and Oxygen.

a)

$CO_2\ +\ H_2O\ \rightarrow\ C_6H_{12}O_6\ +\ O_2$

b)

$CO_2\ +\ H_2O\ +\ C_6H_{12}O_6\ \rightarrow\ O_2$

c)

$CO_2\ +\ H_2O\ \rightarrow\ C_6H_{12}O_6\ +\ O_{ }$

d)

$CO_2\ \rightarrow\ H_2O\ +\ C_6H_{12}O_6\ +\ O_2$

30.

The chemical name of the compound shown is

a)

phosphorus oxide

b)

diphosphorus pentoxide

c)

phosphorus pentoxide

d)

phosphorus penta oxygen

Chemical formulae and equations

Total questions: 30

Worksheet time: 12mins

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