WorksheetsCounting Atoms and Balancing Equations pt 1
Total questions: 15
Worksheet time: 12mins
Name
Class
Date
1.
How many Hydrogen are in 4H2O + 2CH4?
(a)
2.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
3.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
4.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
5.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
6.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
7.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
8.
How many atoms of Carbon are in the compound C2H8O ?
a)
8
b)
2
c)
1
d)
11
9.
The law of conservation of matter states that
a)
chemical reactions change matter.
b)
in chemical reactions, the identity of reactants and products is conserved.
c)
atoms are neither created nor destroyed in chemical reactions.
d)
a chemical equation must be balanced.
10.
Why is the following chemical equation not balanced?
H2 + O2 --> H2O
H2 + O2 --> H2O
a)
each side of the equation has a different number of oxygen atoms
b)
each side of the equation has a different number of hydrogen atoms
c)
each side has the same mass
11.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
12.
Which of the following is an unbalanced equation?
a)
CaCO3 --> CaO + CO2
b)
PbO2 + 2H2-->2Pb + H2O
c)
2Na+ 2H2O-->2NaOH + H2
d)
CS2 + 3O2 --> CO2 + 2SO2
13.
What is the part of the chemical equation in green called?
Fe + S --> FeS
Fe + S --> FeS
a)
products
b)
reactants
c)
yield
d)
chemical formula
14.
How many carbon?
5C6H12O6
(a)
15.
Is this balanced?...
Al + O2 --> 2Al2O3
Al + O2 --> 2Al2O3
a)
Yes!
b)
NO!
100 %
