9/3 Chemical Formulas
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•
Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a chemical formula?
Back
A chemical formula is a way of expressing the composition of a chemical compound using symbols for the elements and numbers to indicate the quantity of each element.
2.
FLASHCARD QUESTION
Front
What is an element?
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means. Elements are listed on the periodic table.
3.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio.
4.
FLASHCARD QUESTION
Front
What does H2SO4 represent?
Back
H2SO4 represents sulfuric acid, a strong acid composed of 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.
5.
FLASHCARD QUESTION
Front
How many atoms are in a molecule of C6H12O6?
Back
A molecule of C6H12O6 (glucose) contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
6.
FLASHCARD QUESTION
Front
What is the significance of subscripts in chemical formulas?
Back
Subscripts in chemical formulas indicate the number of atoms of each element in a molecule. For example, in H2O, the '2' indicates there are 2 hydrogen atoms.
7.
FLASHCARD QUESTION
Front
What is the formula for water?
Back
The formula for water is H2O, which indicates it is made up of 2 hydrogen atoms and 1 oxygen atom.
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