To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen collects in the top of the gas jar, it pushes the water out.
if you want to make your own oxygen;
Mixing sodium hypochlorite (chlorine bleach) and hydrogen peroxide produces oxygen gas, water, and salt. Fill a bottle with water, leaving a headspace for about 60 ml. Add about 25 ml each of 6% chlorine bleach and 3% hydrogen peroxide. Cover the mouth of the bottle with a balloon to collect the (nearly) pure oxygen.
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Answer:
To create oxygen is an tree
Explanation:
Hope it helps
how to create oxygen?
if you want to make your own oxygen;