Gas in our atmosphere

which gas that has most percentage in our air?

• N2O

• N2

• CO2

• O2

which apparatus that not needed for find oxygen experiment?

• Syringe

• Bunsen burner

• spatula

• Clamp

which gas that still be part in our air, not polluted one

• NO

• CO

• CO2

• C

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. reaction any chemical with oxygen called as...

• Combustion

• decomposition

• neutralisation

• acidification