
Balancing Equations
Flashcard
•
Chemistry
•
KG - University
•
Practice Problem
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
What is a balanced chemical equation?
Back
A chemical equation is balanced when the product or products has the same elements and amount of each element as the reactants had before the reaction occurred.
2.
FLASHCARD QUESTION
Front
What does the law of conservation of mass state?
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.
3.
FLASHCARD QUESTION
Front
How many atoms are in 5Na₃PO₄?
Back
40
4.
FLASHCARD QUESTION
Front
What is the first step in balancing a chemical equation?
Back
Identify the number of atoms of each element in the reactants and products.
5.
FLASHCARD QUESTION
Front
What does it mean if a chemical equation is unbalanced?
Back
A chemical equation is unbalanced when the product or products don't have the same elements or amount of each element as the reactants had before the reaction occurred.
6.
FLASHCARD QUESTION
Front
In the equation PCl₅ + ___ H₂O → ___ HCl + H₃PO₄, how many H₂O molecules are needed to balance it?
Back
4
7.
FLASHCARD QUESTION
Front
In the equation H₂ + O₂ → H₂O, why is it not balanced?
Back
Each side of the equation has a different number of oxygen atoms.
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