Balancing Equations
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
+1
Standards-aligned
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a balanced equation?
Back
A balanced equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.
Tags
NGSS.MS-PS1-5
2.
FLASHCARD QUESTION
Front
What does a coefficient represent in a chemical equation?
Back
A coefficient indicates the number of molecules or moles of a substance involved in a reaction.
3.
FLASHCARD QUESTION
Front
What is the purpose of balancing chemical equations?
Back
Balancing chemical equations ensures 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
4.
FLASHCARD QUESTION
Front
How many atoms of oxygen are in the equation: 2H2 + O2 --> 2H2O?
Back
There are 2 atoms of oxygen on the left side and 2 atoms of oxygen on the right side, making it balanced.
Tags
NGSS.MS-PS1-5
5.
FLASHCARD QUESTION
Front
What is the first step in balancing a chemical equation?
Back
The first step is to write down the number of atoms of each element present in the reactants and products.
6.
FLASHCARD QUESTION
Front
What does it mean if a chemical equation is unbalanced?
Back
An unbalanced equation means that the number of atoms of one or more elements is different on the reactant and product sides, violating the conservation of mass.
Tags
NGSS.MS-PS1-5
7.
FLASHCARD QUESTION
Front
In the equation: 4Al + 3O2 --> 2Al2O3, how many aluminum atoms are present?
Back
There are 4 aluminum atoms on the left side and 4 aluminum atoms on the right side.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
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