Find the number of basic flux from the given compounds :
`SiO_(2), MgO,Cab, FeO, B_(2)O_(3), CaCO_(3)`.

Explanation

To find the number of basic fluxes from the given compounds: SiO₂, MgO, CaO, FeO, B₂O₃, and CaCO₃, we will analyze each compound based on its chemical behavior.

### Step-by-Step Solution:

1. **Identify Basic Fluxes**: Basic fluxes are typically metal oxides that can react with acids to form salts and water, or they can produce hydroxides when dissolved in water.

2. **Analyze Each Compound**:
- **SiO₂ (Silicon Dioxide)**: This compound is acidic in nature. It does not behave as a basic flux.
- **MgO (Magnesium Oxide)**: When dissolved in water, it forms magnesium hydroxide (Mg(OH)₂), which is a base. Therefore, MgO is a basic flux.
- **CaO (Calcium Oxide)**: Similar to MgO, when dissolved in water, it forms calcium hydroxide (Ca(OH)₂), which is also a base. Thus, CaO is a basic flux.
- **FeO (Iron(II) Oxide)**: When reacted with SiO₂, it forms FeSiO₃ (slag), indicating that FeO behaves as a basic flux.
- **B₂O₃ (Boron Trioxide)**: This compound is acidic in nature and does not act as a basic flux.
- **CaCO₃ (Calcium Carbonate)**: Upon heating, it decomposes to form CaO and CO₂. The CaO can then react with water to form calcium hydroxide (Ca(OH)₂), which is a base. Therefore, CaCO₃ is also a basic flux.

3. **Count the Basic Fluxes**: From the analysis:
- Basic fluxes identified: MgO, CaO, FeO, and CaCO₃.
- Total number of basic fluxes = 4.

### Final Answer:
The total number of basic fluxes from the given compounds is **4**.

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