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 mass is neither created nor destroyed in a chemical reaction; it remains constant.
2.
FLASHCARD QUESTION
Front
What does a subscript in a chemical formula indicate?
Back
A subscript indicates the number of atoms of an element in a molecule.
3.
FLASHCARD QUESTION
Front
What does a coefficient in a chemical equation represent?
Back
A coefficient represents the number of molecules or moles of a substance in a chemical reaction.
4.
FLASHCARD QUESTION
Front
How do you balance a chemical equation?
Back
To balance a chemical equation, you adjust the coefficients in front of the compounds, not the subscripts.
5.
FLASHCARD QUESTION
Front
What is a balanced chemical equation?
Back
A balanced chemical equation has the same number of each type of atom on both sides of the equation.
6.
FLASHCARD QUESTION
Front
Why can't you change subscripts when balancing equations?
Back
Changing subscripts alters the identity of the substance, which can change the chemical reaction.
7.
FLASHCARD QUESTION
Front
What is the difference between a reactant and a product?
Back
Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.
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