Balancing chemical equations

Flashcard
•
Science
•
7th Grade
•
Hard
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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-PS1-5
2.
FLASHCARD QUESTION
Front
How do you balance a chemical equation?
Back
To balance a chemical equation, adjust the coefficients (the numbers in front of the compounds) to ensure that the number of atoms of each element is the same on both sides.
Tags
NGSS.HS-PS1-7
3.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction; it can only change forms.
Tags
NGSS.MS-PS1-5
4.
FLASHCARD QUESTION
Front
What does the coefficient in a chemical equation represent?
Back
The coefficient represents the number of molecules or moles of a substance involved in the reaction.
Tags
NGSS.MS-PS1-5
5.
FLASHCARD QUESTION
Front
Balance the equation: H2 + O2 -> H2O
Back
2H2 + O2 -> 2H2O
Tags
NGSS.MS-PS1-5
6.
FLASHCARD QUESTION
Front
What is the purpose of balancing chemical equations?
Back
The purpose is to ensure that the same number of atoms of each element are present before and after the reaction, reflecting the conservation of mass.
Tags
NGSS.MS-PS1-5
7.
FLASHCARD QUESTION
Front
How many oxygen atoms are in 3H2O?
Back
There are 3 oxygen atoms in 3H2O.
Tags
NGSS.MS-PS1-1
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