Balancing Chemical Equations

Flashcard
•
Chemistry
•
10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical equation?
Back
A representation of a chemical reaction using symbols and formulas to show the reactants and products.
2.
FLASHCARD QUESTION
Front
What is a coefficient in a chemical equation?
Back
A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.
3.
FLASHCARD QUESTION
Front
What is a subscript in a chemical formula?
Back
A small number written after an element symbol that indicates the number of atoms of that element in a molecule.
4.
FLASHCARD QUESTION
Front
What is the Law of Conservation of Mass?
Back
The principle stating that matter cannot be created or destroyed in a chemical reaction; the mass of reactants equals the mass of products.
5.
FLASHCARD QUESTION
Front
What type of reaction is represented by the equation: 2HI → H2 + I2?
Back
Decomposition reaction.
6.
FLASHCARD QUESTION
Front
What type of reaction is represented by the equation: CH4 + 2O2 → CO2 + 2H2O?
Back
Combustion reaction.
7.
FLASHCARD QUESTION
Front
How do you balance a chemical equation?
Back
By adjusting the coefficients in front of the chemical formulas to ensure the same number of each type of atom on both sides of the equation.
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