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WorksheetsChemical Equations
Total questions: 20
Worksheet time: 15mins
Name
Class
Date
1.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
2.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
3.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
4.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
5.
A molecule is smaller than an atom.
a)
True
b)
False
6.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
7.
How many Hydrogen (H) atoms are in NH3O5
a)
3
b)
4
c)
5
d)
1
8.
A molecule is________
a)
a glob of gelatinous goo
b)
smaller than an atom
c)
filled with raisons
d)
more than one atom bonded together
9.
Which is the Law of Conservation of Matter?
a)
matter cannot be created or destroyed, it only changes form
b)
matter can be created but it cannot be destroyed, it never changes form
c)
matter can be destroyed but it cannot be created, it usually just changes form
d)
matter is an unproven theory created by Hans Geiger
10.
How many molecules of Carbon are in the following formula? 3C2H6
a)
3
b)
6
c)
12
d)
18
11.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
12.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
13.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
14.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
15.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
16.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
17.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2
18.
How many elements are found in the following molecule? Mg(ClO3)2
a)
1
b)
4
c)
3
d)
5
19.
Identify the Reactants in this equation.
a)
A
b)
B
20.
What are the blue numbers called?
a)
oxidation numbers
b)
subscripts
c)
group numbers
d)
product numbers
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