Balancing Chemical Equations

Flashcard
•
Chemistry
•
10th - 12th 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.
2.
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.
3.
FLASHCARD QUESTION
Front
What does a coefficient in a chemical equation represent?
Back
A coefficient indicates the number of molecules or moles of a substance involved in a chemical reaction.
4.
FLASHCARD QUESTION
Front
How do you determine the coefficient needed to balance an equation?
Back
To determine the coefficient, count the number of atoms of each element on both sides of the equation and adjust the coefficients to make them equal.
5.
FLASHCARD QUESTION
Front
What is the first step in balancing a chemical equation?
Back
The first step is to write down the unbalanced equation and count the number of atoms of each element on both sides.
6.
FLASHCARD QUESTION
Front
What is the significance of subscripts in a chemical formula?
Back
Subscripts indicate the number of atoms of each element in a molecule; they cannot be changed when balancing equations.
7.
FLASHCARD QUESTION
Front
How do you balance the equation N2 + O2 → NO?
Back
Place a coefficient of 2 in front of NO to balance the equation: N2 + O2 → 2NO.
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