What does the principle of conservation of mass mean in chemical reactions?
Unit 3: Chemical Reactions Pre-Assessment 6

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Science
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6th - 8th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Matter is not created or destroyed.
2.
FLASHCARD QUESTION
Front
What is the coefficient in the chemical formula 3H₂O?
Back
3
3.
FLASHCARD QUESTION
Front
If there are 4 H atoms on the reactant side, how many H atoms will be on the product side?
Back
4
4.
FLASHCARD QUESTION
Front
What are the products of the chemical reaction that produces CO₂ and H₂O?
Back
CO₂ and H₂O
5.
FLASHCARD QUESTION
Front
Which compounds are the products of the reaction involving C₆H₁₂O₆ + O₂?
Back
CO₂ + H₂O
6.
FLASHCARD QUESTION
Front
What is a chemical reaction?
Back
A process where substances (reactants) are transformed into different substances (products).
7.
FLASHCARD QUESTION
Front
What are reactants in a chemical reaction?
Back
Substances that undergo change during a chemical reaction.
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