Practicing With Formulas Worksheet
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1Name: _____________________
Practicing with Formulas
Science-8, Teacher ___________
Period ____ Date ____________
Directions
A. Write down each of the different elements in the compound.
B. Write down how many atoms of each element there are in the compound.
C. Write down how many molecules of the compound followed by how many atoms there are
in total for each compound.
C
B
A
Examples:
1) NaOH
Na
= 1
O
= 1
1 molecule; 3 atoms in total
H
= 1
2) MgCl
Mg
= 1
2
Cl
= 2
1 molecule; 3 atoms in total
10) 2ZnSO
Zn
= 1x2 = 2
4
S
= 1x2 = 2
2 molecules; 12 atoms in total
O
= 4x2 = 8
1) NaOH
6) 4HNO
3
2) MgCl
7) 2Li
O
2
2
3) 3Li
SO
8) H
O
2
4
2
4) 3NaC
H
O
9) Al
O
2
3
2
2
3
5) NH
Cl
10) 4ZnSO
4
4
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