Balancing chemical reactions

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•
Chemistry
•
9th - 11th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are coefficients in a chemical equation?
Back
Coefficients are the numbers placed before the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.
2.
FLASHCARD QUESTION
Front
What is the principle of conservation of mass?
Back
The principle of conservation of mass states that in a chemical reaction, the mass of the reactants is equal to the mass of the 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 does it mean if a chemical equation is already balanced?
Back
A chemical equation is already balanced if the number of atoms of each element is the same on both sides of the equation without needing to adjust any coefficients.
5.
FLASHCARD QUESTION
Front
What is a skeleton equation?
Back
A skeleton equation is a chemical equation that shows the reactants and products but does not indicate the relative amounts of each substance.
6.
FLASHCARD QUESTION
Front
What is the balanced equation for the reaction of nitrogen and hydrogen to form ammonia?
Back
The balanced equation is: N₂ + 3H₂ → 2NH₃.
7.
FLASHCARD QUESTION
Front
What are the coefficients that balance the equation: Sn + HF → SnF₂ + H₂?
Back
The coefficients are: 1, 2, 1, 1.
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