What is the Law of Conservation of Mass?
Law of conservation of mass

Flashcard
•
Science, Other
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Mass is never created or destroyed in a chemical reaction.
2.
FLASHCARD QUESTION
Front
What does the coefficient in a chemical equation represent?
Back
The number of moles of a substance involved in the reaction.
3.
FLASHCARD QUESTION
Front
Identify the reactants in the reaction: 2Mg + O2 ---> 2MgO.
Back
Mg (magnesium) and O2 (oxygen) are the reactants.
4.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A number placed in front of a compound or element to indicate how many molecules or moles are involved.
5.
FLASHCARD QUESTION
Front
If a reaction starts with 20g of reactants, what should be the total mass of the products?
Back
The total mass of the products should also be 20g, according to the Law of Conservation of Mass.
6.
FLASHCARD QUESTION
Front
What is the significance of balancing a chemical equation?
Back
Balancing a chemical equation ensures that the number of atoms for each element is the same on both sides of the equation.
7.
FLASHCARD QUESTION
Front
What happens to mass during a chemical reaction?
Back
The total mass remains constant; it is conserved.
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