
EI3 Flashcard

Flashcard
•
Science
•
8th Grade
•
Hard
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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, the total mass of reactants must equal the total mass of products in a chemical reaction.
2.
FLASHCARD QUESTION
Front
What happens to the mass of products if gases are released during a reaction?
Back
The total mass of the products will be less than the total mass of the reactants because the gases escape into the air.
3.
FLASHCARD QUESTION
Front
What does a subscript in a chemical formula indicate?
Back
A subscript indicates the number of atoms of the element in a molecule.
4.
FLASHCARD QUESTION
Front
What does a coefficient in a chemical equation represent?
Back
A coefficient indicates the number of molecules or moles of a substance involved in a reaction.
5.
FLASHCARD QUESTION
Front
How do you calculate the total number of atoms in a compound?
Back
To calculate the total number of atoms, multiply the number of atoms of each element by its coefficient and sum them up.
6.
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, satisfying the Law of Conservation of Mass.
7.
FLASHCARD QUESTION
Front
What is a precipitate in a chemical reaction?
Back
A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.
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