Chemistry Unit Test 1.
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What must be true about the number of atoms for each element in a chemical equation?
Back
The reactants and the products have to have the same amount of each element.
2.
FLASHCARD QUESTION
Front
What is the term for the substances formed as a result of a chemical reaction?
Back
Product
3.
FLASHCARD QUESTION
Front
What does the law of conservation of mass state?
Back
The total mass before a chemical reaction is the same as the total mass after the reaction.
4.
FLASHCARD QUESTION
Front
In a chemical equation, what is the information to the right of the arrow called?
Back
Product
5.
FLASHCARD QUESTION
Front
How many oxygen (O) atoms are in the products for the reaction @@2Fe_2O_3 ightarrow 4Fe + 3O_{2}@@?
Back
6
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 chemical equation?
Back
A representation of a chemical reaction using symbols and formulas.
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