Question

what are used to make oxygen​

Answer 1

Answer:

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.

Explanation:

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Answer 2

Answer:

heya,

answer is :- materials are hydrogen peroxide and manganese iv oxide.

If ya need making oxygen there you have to separate of air using either a cryogenic distillation process or a vacuum swing adsorption process.

Hope it helps ya :)