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 and identify whether it contains carbonate (CO3) in its chemical formula.

### Step-by-Step Solution:

1. **Identify the ores and their chemical formulas:**
- Pyrolusite: MnO2 (not a carbonate)
- Malachite: CuCO3·Cu(OH)2 (is a carbonate)
- Diaspore: AlO(OH) (not a carbonate)
- Calamine: ZnCO3 (is a carbonate)
- Cassiterite: SnO2 (not a carbonate)
- Siderite: FeCO3 (is a carbonate)
- Cerussite: PbCO3 (is a carbonate)
- Pyrite: FeS2 (not a carbonate)
- Dolomite: CaMg(CO3)2 (is a carbonate)
- Magnesite: MgCO3 (is a carbonate)

2. **Count the carbonate ores:**
- From the analysis above, we find the following ores are carbonates:
- Malachite (1)
- Calamine (2)
- Siderite (3)
- Cerussite (4)
- Dolomite (5)
- Magnesite (6)

3. **Conclusion:**
- The total number of carbonate ores from the given list is **6**.

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