What does the Law of Conservation of Mass state?
Concept 1.5 Test: Chemical Reactions

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Chemistry
•
6th - 9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Atoms cannot be gained or lost in a chemical reaction.
2.
FLASHCARD QUESTION
Front
What are the substances on the left part of a chemical equation called?
Back
Reactants
3.
FLASHCARD QUESTION
Front
The starting materials in a chemical reaction are called ___________ .
Back
reactants
4.
FLASHCARD QUESTION
Front
How do chemical reactions turn substances into new substances?
Back
The bonds break, the atoms rearrange, forming new bonds and new molecules.
5.
FLASHCARD QUESTION
Front
If you combine two substances in a beaker at room temperature and the beaker feels cold to the touch, it means that the substances:
Back
have undergone an endothermic reaction.
6.
FLASHCARD QUESTION
Front
What are the substances formed as a result of a chemical reaction called?
Back
Products
7.
FLASHCARD QUESTION
Front
What is a chemical equation?
Back
A representation of a chemical reaction using symbols and formulas.
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