Unit 04 Test Review - IPC
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What element has to be present in order for a combustion reaction to occur?
Back
Hydrogen
2.
FLASHCARD QUESTION
Front
Which equation represents the law of conservation of mass?
Back
3Na + Cl₂ → 3NaCl
3.
FLASHCARD QUESTION
Front
Why did the solution in the beaker lose mass?
Back
Some of the water molecules turned into gas and dissipated.
4.
FLASHCARD QUESTION
Front
What type of reaction is represented by a single replacement reaction?
Back
A reaction where one element replaces another in a compound.
5.
FLASHCARD QUESTION
Front
How does the equation 2H₂ + O₂ → 2H₂O demonstrate the law of conservation of mass?
Back
The reactants and product contain the same number and type of atoms.
6.
FLASHCARD QUESTION
Front
What is a combustion reaction?
Back
A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat.
7.
FLASHCARD QUESTION
Front
Define the law of conservation of mass.
Back
Mass is neither created nor destroyed in a chemical reaction; it is conserved.
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