Chemical Reactions Review 2024

Flashcard
•
Science
•
6th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that the mass of a system (reaction) stays the same from beginning to end.
2.
FLASHCARD QUESTION
Front
What are reactants in a chemical reaction?
Back
Reactants are the substances that undergo a chemical change in a reaction. For example, in the reaction of O2 and CH4, these are the reactants.
3.
FLASHCARD QUESTION
Front
How many Oxygen (O) atoms are in one molecule of C2HO8Cl2?
Back
There are 8 Oxygen (O) atoms in one molecule of C2HO8Cl2.
4.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Example: A glass falling and shattering.
5.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a change that results in the formation of new chemical substances. Example: Baking a birthday cake.
6.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change does not change the substance's chemical identity, while a chemical change results in new substances being formed.
7.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
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