Semester 1 Review
Flashcard
•
Science
•
8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What do coefficients in chemical formulas do?
Back
Coefficients multiply EVERYTHING in the chemical formula.
2.
FLASHCARD QUESTION
Front
What is the composition of C₃H₅(NO₃)₃?
Back
C = 3, H = 5, N = 3, O = 9
3.
FLASHCARD QUESTION
Front
How many elements are in the chemical formula NaHCO₃?
Back
There are 4 elements: Na, H, C, O.
4.
FLASHCARD QUESTION
Front
What type of change occurs when a substance transforms into a different substance?
Back
This is a Chemical Change.
5.
FLASHCARD QUESTION
Front
How many total POTASSIUM atoms are in the formula K₂SO₄?
Back
There are 2 potassium atoms.
6.
FLASHCARD QUESTION
Front
What is a chemical formula?
Back
A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.
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