W9 WEEKLY TEST in SCIENCE 7
Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What are the products of the reaction: NH₃ + CO₂ --> ?
Back
The products are CH₄N₂O + H₂O.
2.
FLASHCARD QUESTION
Front
If a reactant weighs 15 g and another weighs 20 g, what is the weight of the products?
Back
The weight of the products is 35 g.
3.
FLASHCARD QUESTION
Front
Does the equation CH₂ + O₂ → CO₂ + H₂O follow the Law of Conservation of Mass?
Back
No, it does not follow the Law of Conservation of Mass.
4.
FLASHCARD QUESTION
Front
What does it indicate if a yellow solid forms when two clear solutions are mixed?
Back
A chemical reaction has occurred, forming a precipitate.
5.
FLASHCARD QUESTION
Front
In the reaction 2H₂ + O₂ → 2H₂O, what happens to the atoms?
Back
The atoms are rearranged to form new molecules.
6.
FLASHCARD QUESTION
Front
What is the Law of Conservation of Mass?
Back
The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction.
7.
FLASHCARD QUESTION
Front
Define a chemical reaction.
Back
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
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