What is the Law of Conservation of Mass?
Doc's Law of Conservation of Mass Practice

Flashcard
•
Science
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction. The total mass of the reactants must equal the total mass of the products.
2.
FLASHCARD QUESTION
Front
Does the equation 2KClO₃ → 2KCl + 3O₂ follow the Law of Conservation of Mass?
Back
Yes, the mass of the reactants (2KClO₃) equals the mass of the products (2KCl + 3O₂).
3.
FLASHCARD QUESTION
Front
If 21g of NaN₃ is used to make 11g of N₂, how much Na will be produced?
Back
10g of Na will be produced, following the Law of Conservation of Mass.
4.
FLASHCARD QUESTION
Front
How many elements are in the formula BaBr₂?
Back
There are 2 elements in BaBr₂: Barium (Ba) and Bromine (Br).
5.
FLASHCARD QUESTION
Front
Does the reaction (NH₄)Cr₂O₇ → Cr₂O₃ + N₂ + H₂O follow the Law of Conservation of Mass?
Back
No, this reaction does not follow the Law of Conservation of Mass as the mass of the reactants does not equal the mass of the products.
6.
FLASHCARD QUESTION
Front
Does the reaction NaSiO₃ + 8HF → H₂SiF₆ + 2NaF + 3H₂O follow the Law of Conservation of Mass?
Back
No, this reaction does not follow the Law of Conservation of Mass.
7.
FLASHCARD QUESTION
Front
What is a reactant in a chemical reaction?
Back
A reactant is a substance that undergoes change during a chemical reaction.
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