Review: LOCOM in Reactions
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Science
•
8th Grade
•
Hard
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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 in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction.
2.
FLASHCARD QUESTION
Front
What does it mean to balance a chemical equation?
Back
Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation.
3.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved in the reaction.
4.
FLASHCARD QUESTION
Front
Why is it important to balance chemical equations?
Back
It is important to balance chemical equations to ensure that the same number of each type of atom is present on both sides, reflecting the conservation of mass.
5.
FLASHCARD QUESTION
Front
What does it indicate if a chemical reaction produces different products?
Back
The production of different products indicates that a chemical change has occurred, but it does not directly relate to the conservation of mass.
6.
FLASHCARD QUESTION
Front
In the reaction @@2KClO_3 ightarrow 2KCl + 3O_2@@, what can be said about the mass of reactants and products?
Back
7.
FLASHCARD QUESTION
Front
What role do coefficients play in the reaction @@N_2 + 3H_2 ightarrow 2NH_3@@?
Back
Coefficients indicate the number of molecules involved in the reaction, showing the ratio of reactants to products.
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