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WorksheetsCHEMICAL FORMULAS AND EQUATIONS
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
CaCO3 represents a
a)
Symbol
b)
Formula
c)
Subscript
d)
Coefficient
2.
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.
3.
How many total atoms are in 2C2HO8Cl2
a)
23
b)
46
c)
3
d)
22
4.
How many molecules of the compound are in the following formula? 3C2H6
a)
3
b)
6
c)
12
d)
18
5.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
6.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
7.
Balance this equation...
HgO --> Hg + O2
HgO --> Hg + O2
a)
It is balanced
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
d)
I don't know...Oh well!
8.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
9.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
10.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
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