Faculty of Science
Department of Chemistry
Academic Year 2022-2023 – Term-III
Grade 9 Am – Test 1
3.7 Chemical Reactions and Chemical Equations
Name: _____________________

Date: ______________
Section: __________
Indicate the number of atoms for each of the elements in the chemical equations below and then
decide if the equation is balanced or not balanced
Example:
H2 + O2

H2O
Elements
Reactants side
Product side
Equal masses?
H
2
2
Yes
O
2
1
No
Is the equation balanced or not balanced? __No__
N2 + 3H2
Elements
Reactants side

2NH3
Product side
N
H
Is the equation balanced or not balanced? __________
Equal masses?
Faculty of Science
Department of Chemistry
Academic Year 2022-2023 – Term-III
Grade 9 Am – Test 1
3.7 Chemical Reactions and Chemical Equations
2KClO3
Elements
Reactants side

KCl + 3O2
Equal masses?
Product side
K
Cl
O
Is the equation balanced or not balanced? __________
2NaCl + F2
Elements
Reactants side

2NaF + Cl2
Product side
Na
Cl
F
Is the equation balanced or not balanced? __________
Equal masses?