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It’s unclear what chemical substance Y referred to in the question is, so here’s an example with water (H₂O) to illustrate how to write:

1. Definition of H₂O:

This is a fairly familiar compound, also known as water. The structure of water consists of 2 hydrogen atoms and 1 oxygen atom. The atomic mass of water is 18. H₂O can create ions by allowing water to react with other substances.

2. Properties of H₂O:

• Physical properties: Water is in a liquid state, colorless, odorless and has a PH=7.
• Chemical properties: Water has the ability to react with many other substances such as metals, acids or salts.

3. Common chemical equations:

   • Metal reaction: Na + 2H₂O -> 2NaOH + H₂
   • Acid reaction: H₂SO₄ + 2H₂O -> 2H₃O + + SO₄^2-
   • Non-metal reaction: C + H₂O -> CO + H₂
   • Reaction with salt: NaCl + H₂O -> Na + + Cl-

4. Synthesis of H₂O:

• Laboratory synthesis: 2H₂(gas) + O₂(gas) -> 2H₂O
• Industrial synthesis: Water synthesis in industry usually involves a process of cleaning and removing pollutants.

Note: The above is for illustrative purposes only, please refer to reliable sources for accurate information.