Write balanced chemical equations for the following reaction
Cinnabar is heated in the air.

Explanation

To write the balanced chemical equation for the reaction when cinnabar (HgS) is heated in the air, we follow these steps:

### Step 1: Identify the Reactants and Products
Cinnabar is primarily composed of mercury sulfide (HgS). When heated in the presence of air (which contains oxygen), it decomposes into mercury (Hg) and sulfur dioxide (SO₂).

**Reactants:** Cinnabar (HgS) + Oxygen (O₂)
**Products:** Mercury (Hg) + Sulfur Dioxide (SO₂)

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