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- 1. Multiple Choice
which gas that has most percentage in our air?
N2O
N2
CO2
O2
- 2. Multiple Choice
which apparatus that not needed for find oxygen experiment?
Syringe
Bunsen burner
spatula
Clamp
- 3. Multiple Choice
which gas that still be part in our air, not polluted one
NO
CO
CO2
C
- 4. Multiple Choice
4. which reason that cause, if our calculation inside experiment isn't 21%?
metal in excess
measuring the air inside the syringe
metal not enough at beginning
not enough air
- 5. Multiple Choice
5. reaction any chemical with oxygen called as...
Combustion
decomposition
neutralisation
acidification
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