Chemical Equations
Flashcard
•
Science
•
8th Grade
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical equation?
Back
A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.
Tags
NGSS.MS-PS1-5
2.
FLASHCARD QUESTION
Front
What do coefficients in a chemical equation represent?
Back
Coefficients indicate the number of molecules or moles of a substance involved in a reaction.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
3.
FLASHCARD QUESTION
Front
What do subscripts in a chemical formula indicate?
Back
Subscripts indicate the number of atoms of an element in a molecule.
Tags
NGSS.MS-PS1-1
4.
FLASHCARD QUESTION
Front
How do you determine the total number of atoms in a compound?
Back
Add the number of atoms of each element, multiplied by their respective coefficients.
5.
FLASHCARD QUESTION
Front
What is the difference between a reactant and a product?
Back
Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
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.
Tags
NGSS.MS-PS1-5
7.
FLASHCARD QUESTION
Front
How many total atoms are in the compound 4NH3?
Back
There are 16 total atoms in 4NH3 (4 nitrogen and 12 hydrogen).
Tags
NGSS.MS-PS1-1
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