Balancing Reactions
Flashcard
•
Chemistry
•
8th Grade - University
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a process where one or more substances are transformed into different substances with distinct properties.
2.
FLASHCARD QUESTION
Front
What is the purpose of a coefficient in a chemical equation?
Back
A coefficient indicates the number of molecules or moles of a substance involved in a chemical reaction.
3.
FLASHCARD QUESTION
Front
How many molecules of water are produced in the reaction 2H2 + O2 -> 2H2O?
Back
2 water molecules are produced.
4.
FLASHCARD QUESTION
Front
What is a decomposition reaction?
Back
A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products, represented as AB -> A + B.
5.
FLASHCARD QUESTION
Front
In a balanced chemical equation, what must be the same on both sides?
Back
The same number of atoms of each element must be present on both sides of the equation.
6.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
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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