Balancing Chemical Equations Flashcard
Flashcard
•
Chemistry
•
10th Grade
•
Easy
ROBERT KEEFNER
Used 1+ times
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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
How do you balance the equation H2 + Cl2 -> HCl?
Back
The balanced equation is H2 + Cl2 -> 2HCl, meaning one molecule of hydrogen reacts with one molecule of chlorine to produce two molecules of hydrochloric acid.
3.
FLASHCARD QUESTION
Front
What is the Law of Conservation of Matter/Mass?
Back
The Law of Conservation of Matter/Mass states that matter cannot be created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
4.
FLASHCARD QUESTION
Front
What are coefficients in a chemical equation?
Back
Coefficients are the numbers placed before compounds in a chemical equation to indicate how many molecules or moles of each reactant and product are involved.
5.
FLASHCARD QUESTION
Front
What are subscripts in a chemical formula?
Back
Subscripts are the small numbers written after an element symbol in a chemical formula that indicate the number of atoms of that element in a molecule.
6.
FLASHCARD QUESTION
Front
Why can't subscripts be changed when balancing equations?
Back
Changing subscripts alters the identity of the substance, which is not allowed when balancing equations; only coefficients can be adjusted.
7.
FLASHCARD QUESTION
Front
What is an unbalanced chemical equation?
Back
An unbalanced chemical equation does not have the same number of each type of atom on both sides, meaning it does not obey the Law of Conservation of Matter.
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