The number of carbonate ore among the following.
pyrolusite, Malachite, Diaspore, Calamine, Cassiterite, Siderite, Cerussite, Pyrite, Dolomite, Magnesite.

Answer

To determine the number of carbonate ores from the given list, we will analyze each ore one by one and identify whether it is a carbonate ore or not.

### Step-by-Step Solution:

1. **Identify Each Ore**:
- **Pyrolusite**: This is MnO2 (Manganese dioxide) - Not a carbonate.
- **Malachite**: This is CuCO3·Cu(OH)2 (Copper(II) carbonate hydroxide) - This is a carbonate.
- **Diaspore**: This is AlO(OH) (Aluminium oxide hydroxide) - Not a carbonate.
- **Calamine**: This is ZnCO3 (Zinc carbonate) - This is a carbonate.
- **Cassiterite**: This is SnO2 (Tin dioxide) - Not a carbonate.
- **Siderite**: This is FeCO3 (Iron carbonate) - This is a carbonate.
- **Cerussite**: This is PbCO3 (Lead carbonate) - This is a carbonate.
- **Pyrite**: This is FeS2 (Iron sulfide) - Not a carbonate.
- **Dolomite**: This is CaCO3·MgCO3 (Calcium magnesium carbonate) - This is a carbonate.
- **Magnesite**: This is MgCO3 (Magnesium carbonate) - This is a carbonate.

2. **Count the Carbonate Ores**:
- From the analysis, the carbonate ores identified are:
- Malachite
- Calamine
- Siderite
- Cerussite
- Dolomite
- Magnesite
- Total carbonate ores = 6.

### Final Answer:
The number of carbonate ores among the given list is **6**.

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