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15
×
Why does a candle go out under a jar?
The oxygen runs out.
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15
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What is combustion?
A reaction where something burns in oxygen and releases energy.
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thief
Give points!
5
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25
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fairy
Take points!
5
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25
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shark
Other team loses 10 points!
Okay!
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baam
Lose 20 points!
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15
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What is incomplete combustion?
Burning with not enough oxygen.
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What are products?
The new substances formed in a reaction.
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Atoms are = ?
Tiny particles that make up substances.
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What does HâO mean? (what atoms are present?)
2 hydrogen atoms and 1 oxygen atom.
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15
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Why does a yellow flame produce soot?
There is not enough oxygen, so incomplete combustion occurs.
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15
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Oâ = ?
2 oxygen atoms / oxygen gas.
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seesaw
Swap points!
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rocket
Go to first place!
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rocket
Go to first place!
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baam
Lose 10 points!
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15
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Which type of combustion uses the blue flame on a bunsen burner?
Complete combustion
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15
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Mass can disappear in a reaction - T/F?
F
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15
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What is a chemical reaction?
A process where substances change into new substances.
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Mass is = ?
The amount of matter in something.
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boom
Lose 50 points!
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magnet
Take 25 points!
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rocket
Go to first place!
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thief
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5
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15
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25
15
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Why do we balance equations?
To show conservation of mass / same number of atoms on both sides.
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