Balancing Chemical Equations

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
It states that matter cannot be created or destroyed.
2.
FLASHCARD QUESTION
Front
What is the sum of all the coefficients when the equation H2 + O2 --> H2O is balanced?
Back
5
3.
FLASHCARD QUESTION
Front
Is H2O an element or a compound?
Back
Compound
4.
FLASHCARD QUESTION
Front
What type of reaction is CaCO3 --> CaO + CO2?
Back
Decomposition
5.
FLASHCARD QUESTION
Front
How many HCl molecules are needed to balance the equation Mg + __HCl --> MgCl2 + H2?
Back
2
6.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A number placed in front of a chemical formula to indicate how many molecules are involved in the reaction.
7.
FLASHCARD QUESTION
Front
What is a reactant in a chemical reaction?
Back
A substance that undergoes change during a chemical reaction.
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