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Write the observations for the following...

Write the observations for the following: Zinc oxide is heated in a test tube.

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**Step-by-Step Solution:** 1. **Identify the Substance**: The substance in question is zinc oxide (ZnO), which is typically a white powder at room temperature. 2. **Heating the Substance**: When zinc oxide is heated in a test tube, it undergoes a thermal decomposition reaction. 3. **Observation of Color Change**: As zinc oxide is heated, it loses oxygen. This results in a change in color from white to yellow. This color change indicates that a chemical change is occurring. ...
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