4.3 Balancing Equations
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•
Chemistry
•
8th Grade
•
Hard
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1.
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 atoms of that substance are involved in the reaction.
2.
FLASHCARD QUESTION
Front
What does the principle of conservation of mass state?
Back
The principle of conservation of mass states that matter is not created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
3.
FLASHCARD QUESTION
Front
How do you balance a chemical equation?
Back
To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.
4.
FLASHCARD QUESTION
Front
What is a reactant in a chemical reaction?
Back
A reactant is a substance that undergoes a change during a chemical reaction, found on the left side of the equation.
5.
FLASHCARD QUESTION
Front
What is a product in a chemical reaction?
Back
A product is a substance that is formed as a result of a chemical reaction, found on the right side of the equation.
6.
FLASHCARD QUESTION
Front
What does it mean if a chemical equation is balanced?
Back
A balanced chemical equation has the same number of each type of atom on both sides, indicating that mass is conserved.
7.
FLASHCARD QUESTION
Front
How many atoms of aluminum are in the equation 4Al + 3O2 → 2Al2O3?
Back
There are 4 atoms of aluminum on the left side and 4 atoms on the right side, so the equation is balanced for aluminum.
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