1. What is the chemical symbol for calcium carbonate?
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2. Which of these is limestone used for?
3. When calcium carbonate has been heated, what does it produce when it decomposes?
- Calcium oxide and Carbon dioxide
- Calcium oxide and Carbon oxide
- Carbon dioxide and calcium
4. What is limestone mainly made of?
- Calcium carbonate
- Carbon dioxide
5. What is the chemical symbol for calcium oxide?