The Law of Conservation of Mass

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•
Science
•
8th Grade
•
Hard
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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, the total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction. Mass cannot be created or destroyed.
2.
FLASHCARD QUESTION
Front
Back
22
3.
FLASHCARD QUESTION
Front
What does it mean for a chemical reaction to be balanced?
Back
A chemical reaction is balanced when the number of atoms of each element is the same on both the reactant and product sides.
4.
FLASHCARD QUESTION
Front
What is a subscript in a chemical formula?
Back
A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.
5.
FLASHCARD QUESTION
Front
Which of the following substances cannot be broken down into simpler substances: Na, H2O, C6H12O6, CO?
Back
Na (Sodium) cannot be broken down into simpler substances.
6.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved.
7.
FLASHCARD QUESTION
Front
What is the difference between a reactant and a product in a chemical reaction?
Back
Reactants are the starting substances in a chemical reaction, while products are the substances formed as a result of the reaction.
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