Balancing Equations
Flashcard
•
Chemistry
•
8th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the Law of Conservation of Mass?
Back
Matter cannot be gained or lost in a chemical reaction.
2.
FLASHCARD QUESTION
Front
What is the total mass of the reactants compared to the total mass of the products at the end of a chemical reaction?
Back
The mass is the same.
3.
FLASHCARD QUESTION
Front
What does it mean for a chemical equation to be balanced?
Back
The number of atoms of each element is the same on both sides of the equation.
4.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
The large number to the left of a formula.
5.
FLASHCARD QUESTION
Front
How do you balance the equation Al2O3 --> Al + O2?
Back
2Al2O3 --> 4Al + 3O2.
6.
FLASHCARD QUESTION
Front
What is a reactant in a chemical reaction?
Back
A substance that undergoes change during a chemical reaction.
7.
FLASHCARD QUESTION
Front
What is a product in a chemical reaction?
Back
A substance that is formed as a result of a chemical reaction.
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