Worksheets8 Science Counting Atoms, Balancing Equations, Type of Reactions
Total questions: 14
Worksheet time: 12mins
Name
Class
Date
1.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
2.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
3.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
4.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
5.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
6.
Which of the Following Correctly Balances this Equation?
_H2+_Cl2 --> _HCl
_H2+_Cl2 --> _HCl
a)
2H2 + Cl2 --> 4HCl
b)
H2+Cl2 --> 2HCl
c)
3H2 + 3Cl2 --> HCl
d)
H + Cl --> HCl
7.
When balancing equations what does
-->
mean?
-->
mean?
a)
subscript
b)
equals
c)
it is just an arrow
d)
yield
8.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO
N2+O2--> _NO
a)
1
b)
2
c)
3
d)
4
9.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
10.
Is this chemical equation balanced or unbalanced?
2H2O --> 2HO
2H2O --> 2HO
a)
Balanced
b)
Unbalanced
11.
The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
12.
The following is what type of reaction:
NH3 + HCl → NH4Cl
NH3 + HCl → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
13.
What type a reaction is taking place in this picture?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
14.
C4H12 + O2 → CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
100 %
