WorksheetsChemical Equation - Test Warm-up
Total questions: 20
Worksheet time: 42mins
Name
Class
Date
1.
What coffecients would balance the following chemical equation:
P + O2 → P4O10
P + O2 → P4O10
a)
1, 1, 1
b)
1, 2, 1
c)
4, 5, 1
d)
3, 2, 4
2.
What are the products in the following chemical equation:
P + O2 → P4O10
P + O2 → P4O10
a)
P
b)
O2
c)
P & O2
d)
P4O10
3.
What are the reactants in the following chemical equation:
P + O2 → P4O10
P + O2 → P4O10
a)
P
b)
O2
c)
P & O2
d)
P4O10
4.
What are the reactants in the following chemical equation:
Al2O3 → Al + O2
Al2O3 → Al + O2
a)
Al2O3
b)
Al
c)
O2
d)
Al & O2
5.
How many reactants are in the following chemical equation:
P + O2 → P4O10
P + O2 → P4O10
a)
1
b)
2
c)
3
d)
14
6.
How many reactants are in the following chemical equation:
Al2O3 → Al + O2
Al2O3 → Al + O2
a)
1
b)
2
c)
3
d)
14
7.
How many products are in the following chemical equation:
Al2O3 → Al + O2
Al2O3 → Al + O2
a)
1
b)
2
c)
3
d)
14
8.
How many products are in the following chemical equation:
P + O2 → P4O10
P + O2 → P4O10
a)
1
b)
2
c)
3
d)
14
9.
What coffecients would balance the following chemical equation:
Al2O3 → Al + O2
a)
1, 1, 1
b)
1, 2, 1
c)
4, 5, 1
d)
2, 4, 3
10.
What are the products in the following chemical equation:
Al2O3 → Al + O2
Al2O3 → Al + O2
a)
Al2O3
b)
Al
c)
O2
d)
Al + O2
11.
Which chemical reaction below has more products than reactants?
a)
BaCl2 + H2SO4 → BaSO4 + 2HCl
b)
HgO → 2Hg + O2
c)
P4 + 3 O2 →2 P2O3
d)
10 C + 20 H2 → 10 CH4
12.
Which chemical reaction below has the most reactants?
a)
P4 + 3 O2 →2 P2O3
b)
HgO → 2 Hg + O2
13.
To balance a chemical equation, it may be necessary to adjust the
a)
Coefficients
b)
Subscripts
c)
Formulas of the products
d)
Number of products
14.
Chemical equations must be balanced to satisfy ____.
a)
the law of definite proportions
b)
the law of multiple proprtions
c)
the law of conservation of mass
d)
Avogadro's principle
15.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
16.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
17.
How many atoms of oxygen are represented in 2Ca(NO3)2?
a)
4
b)
6
c)
10
d)
12
18.
True or False: When balancing chemical equations the subscripts can change.
a)
true
b)
false
19.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
20.
Chemical symbols and chemical formulas are used to write ___________ which describe chemical reactions.
a)
Chemical reactions
b)
Chemical equations
c)
Chemical symbols
d)
Chemical formulas
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