Physical Science: Balancing Equations

Flashcard
•
Chemistry
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a Balanced Chemical Equation (BCE)?
Back
A Balanced Chemical Equation shows the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.
2.
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 total mass of reactants equals the total mass of products; matter cannot be created or destroyed.
3.
FLASHCARD QUESTION
Front
What does it mean when we say 'matter is not created or destroyed'?
Back
It means that during a chemical reaction, the total amount of matter remains constant; atoms are rearranged but not lost or gained.
4.
FLASHCARD QUESTION
Front
How do you balance a chemical equation?
Back
To balance a chemical equation, adjust the coefficients in front of the chemical formulas to ensure that the number of atoms for each element is the same on both sides.
5.
FLASHCARD QUESTION
Front
What is the significance of coefficients in a chemical equation?
Back
Coefficients indicate the number of molecules or moles of a substance involved in a reaction, helping to balance the equation.
6.
FLASHCARD QUESTION
Front
What is the first step in balancing a chemical equation?
Back
The first step is to write the unbalanced equation and count the number of atoms of each element on both sides.
7.
FLASHCARD QUESTION
Front
What is an example of a balanced chemical equation?
Back
An example is: 2H₂ + O₂ → 2H₂O, which shows that 4 hydrogen atoms and 2 oxygen atoms are present on both sides.
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