
Balance equations
Flashcard
•
Chemistry
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a balanced equation?
Back
A balanced equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.
2.
FLASHCARD QUESTION
Front
How do you determine the number of atoms in a compound?
Back
Count the subscripts in the chemical formula. For example, in H2O, there are 2 hydrogen atoms and 1 oxygen atom.
3.
FLASHCARD QUESTION
Front
What does the subscript in a chemical formula represent?
Back
The subscript indicates the number of atoms of the element in the molecule. For example, in CO2, the '2' indicates there are 2 oxygen atoms.
4.
FLASHCARD QUESTION
Front
What is the law of conservation of mass?
Back
The law states that mass cannot be created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
5.
FLASHCARD QUESTION
Front
How many Aluminum (Al) atoms are in Al2O3?
Back
There are 2 Aluminum (Al) atoms in Al2O3.
6.
FLASHCARD QUESTION
Front
How many elements are in C6H12O6?
Back
There are 3 different elements in C6H12O6: Carbon (C), Hydrogen (H), and Oxygen (O).
7.
FLASHCARD QUESTION
Front
How many atoms of carbon (C) are in C6H12O6?
Back
There are 6 Carbon (C) atoms in C6H12O6.
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