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WorksheetsLaw of Conservation of Matter
Total questions: 19
Worksheet time: 27mins
What does the Law of Conservation of Matter state?
Matter cannot be gained or lost in a chemical reaction.
Matter can only be lost in a chemical reaction.
Matter can only be gained in a chemical reaction.
Matter can be gained and lost in a chemical reaction.
What is the part of the chemical equation in green called?
Fe + S → FeS
products
reactants
yield
input
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
Reactants
Products
Yields
Output
How many different elements are in C6H12O6?
1
2
3
4
This is used to represent the number of each atom being represented.
A Exponent
The Coefficient
A Molecule
The Subscript
A chemical reaction is balanced when
both sides have the same elements
both sides have the same number of atoms
both sides have the same subscripts
the molecules are the same on each side
Is the following equation balanced or unbalanced?
Fe + S2 → FeS2
balanced
unbalanced
H2 + O2 --> H2O
In a chemical reaction,
the atoms of the reactants always stay together.
the atoms of the reactants rearrange, to form new products.
new atoms are formed when combined to make the products
some atoms disappear & others multiply to form products
What is the best way to measure the amount of matter?
mass
volume
weight
density
Students want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed bag. Which of the following would provide the evidence the students need?
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
Bubbles were produced during the reaction, which meant that a gas was being produced.
The plastic bag did not change in any way, indicating that it was involved in the reaction.
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.
This type of system allows matter to flow freely in and out...
Closed System
Open System
