Chemical Reactions 2024
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What does the law of conservation of mass mean in chemical reactions?
Back
Matter is not created or destroyed.
2.
FLASHCARD QUESTION
Front
What is the only sure evidence for a chemical reaction?
Back
The production of one or more new substances.
3.
FLASHCARD QUESTION
Front
What do the numbers in front of a chemical formula in an equation represent?
Back
The number of molecules or atoms of each substance in the reaction.
4.
FLASHCARD QUESTION
Front
What does CaCO3 represent in chemistry?
Back
A chemical formula.
5.
FLASHCARD QUESTION
Front
Why must equations be balanced in chemical reactions?
Back
To show the conservation of mass.
6.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process that leads to the transformation of one set of chemical substances to another.
7.
FLASHCARD QUESTION
Front
What is a reactant?
Back
A substance that takes part in and undergoes change during a reaction.
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