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WorksheetsConservation of Mass Quiz Review
Total questions: 15
Worksheet time: 8mins
Before the equation is balanced, how many Nitrogen are on the products side?
1
2
3
4
Why does this picture demonstrate the Law of Conservation of Mass?
the number of atoms of each element are the same on both sides
they start out separate and end up combined
the same elements are used
it doesn't demonstrate the Law of Conservation of Mass
How many oxygen atoms are in the products for the chemical reaction below?
4Fe + 3O2 → 2Fe2O3
2
3
5
6
The Law of Conservation of Mass says that matter can neither be __________ or __________.
created; destroyed
recycled; renewed
subtracted; added
joined; separated
How many atoms are in the products below?
4Fe +3O2 → 2Fe2O3
7
10
17
20
How many Hydrogen atoms are in 4H2O?
6
8
2
4
How many oxygen atoms are in this chemical formula?
6 oxygen atoms
2 oxygen atoms
3 oxygen atoms
4 oxygen atoms
Is mass being conserved?
Yes
No
Not enough information
How do we know that mass is being conserved in this chemical equation?
Mass is not being conserved.
There is the same amount of atoms of each element on both sides of the equation
Each element is found on both sides of the equation
There are red and white atoms on both sides of the equation
How many oxygen atoms are there on the reactant side of the equation?
1
4
2
6
Is mass being conserved? How do we know?
A. Yes, there are grey and white atoms on both sides
B. No, there is an extra grey atom on the product side.
C. No, there are not the same number of each element on both sides of the equation
D. Both B and C
E. None of the above
True or False: The mass of the Hydrogen atoms are equal before and after the reaction.
True
False
What is an accurate equation for the above picture?
2 crackers+ 3 marshmallows+ 3 chocolate squares --> 1 S'more
2 crackers+ 1 marshmallows+ 3 chocolate squares --> 1 S'more
2 crackers+ 1 marshmallows+ 2 chocolate squares --> 1 S'more
4 crackers+ 1 marshmallows+ 3 chocolate squares--> 1 S'more
