What is carborundum ?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Carborundum**: Carborundum is commonly known as silicon carbide. It is a compound made up of silicon and carbon.

2. **Chemical Composition**: The chemical formula for silicon carbide is SiC, indicating that it consists of silicon (Si) and carbon (C) atoms.

3. **Properties of Carborundum**:
- **Low Density**: Carborundum has a relatively low density, which makes it lightweight.
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