Balancing equations
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
+1
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a balanced chemical equation?
Back
A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
2.
FLASHCARD QUESTION
Front
What is the purpose of balancing chemical equations?
Back
The purpose is to ensure that the law of conservation of mass is followed, meaning that matter is neither created nor destroyed in a chemical reaction.
Tags
NGSS.MS-PS1-5
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 to indicate how many molecules or moles of that substance are involved in the reaction.
Tags
NGSS.MS-PS1-1
4.
FLASHCARD QUESTION
Front
What is a subscript in a chemical formula?
Back
A subscript is a small number written after an element symbol that indicates the number of atoms of that element in a molecule.
5.
FLASHCARD QUESTION
Front
How do you determine if a chemical equation is balanced?
Back
Count the number of atoms of each element on both sides of the equation. If they are equal, the equation is balanced.
Tags
NGSS.MS-PS1-5
6.
FLASHCARD QUESTION
Front
What is the first step in balancing a chemical equation?
Back
The first step is to write down the unbalanced equation and count the number of atoms of each element on both sides.
7.
FLASHCARD QUESTION
Front
What does it mean if an equation is unbalanced?
Back
An unbalanced equation means that the number of atoms of at least one element is different on the reactant side compared to the product side.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
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