Water forms from its elements according to the reaction: 2 h2 + o2 --> 2 h2o. in this reaction, which element is reduced?

Oxygen is reduced while hydrogen is oxidized.

Explanation:

Chemical reaction:

2H₂ + O₂ → 2H₂O

The oxidation state of hydrogen and oxygen in left side is zero while on right side the charge on oxygen is -2 and hydrogen is H₂⁺² . So hydrogen is oxidized and oxygen is reduced.

oxygen is oxidizing agent while hydrogen is reducing agent.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Oxidizing agents:

Oxidizing agents oxidize the other elements and itself gets reduced.

Reducing agents:

Reducing agents reduced the other element are it self gets oxidized.

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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