Law of conservation of mass
Flashcard
•
Science, Other
•
7th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the Law of Conservation of Mass?
Back
The Law of Conservation of Mass states that in a closed system, mass is neither created nor destroyed during a chemical reaction. The total mass of reactants equals the total mass of products.
2.
FLASHCARD QUESTION
Front
In a chemical reaction, what must be true for it to be balanced?
Back
A chemical reaction is balanced when both sides have the same number of atoms of each element.
3.
FLASHCARD QUESTION
Front
If 5g of reactant A and 4g of reactant B react to form product C, what is the mass of product C?
Back
The mass of product C is 9g, as per the Law of Conservation of Mass.
4.
FLASHCARD QUESTION
Front
What happens to the mass of reactants during a chemical reaction?
Back
The mass of reactants remains the same before and after the reaction; it is conserved.
5.
FLASHCARD QUESTION
Front
What is an example of a chemical reaction that demonstrates the Law of Conservation of Mass?
Back
When magnesium (24g) reacts with fluorine (38g) to produce magnesium fluoride, the total mass of products (62g) equals the total mass of reactants.
6.
FLASHCARD QUESTION
Front
What does it mean when we say matter can be transformed?
Back
It means that matter can change forms or states during a chemical reaction, but the total mass remains constant.
7.
FLASHCARD QUESTION
Front
What is the significance of balancing a chemical equation?
Back
Balancing a chemical equation ensures that the Law of Conservation of Mass is upheld, showing that mass is conserved in the reaction.
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