Which of the following is magnetite ?

Options

A. `Fe_(2)CO_(3)`
B. `Fe_(2)O_(3)`
C. `Fe_(3)O_(4)`
D. `Fe_(2)O_(3)*3H_(2)O`

Answer

To determine which of the given options is magnetite, we need to identify the correct chemical formula for magnetite. Here’s a step-by-step solution:

### Step 1: Understand the Definition of Magnetite
Magnetite is a naturally occurring mineral that is an iron oxide. It is one of the main ores of iron and is known for its magnetic properties.

### Step 2: Recall the Chemical Formula of Magnetite
The chemical formula for magnetite is Fe3O4. This means that it consists of three iron (Fe) atoms and four oxygen (O) atoms.

### Step 3: Analyze the Given Options
The options provided are:
1. Fe2CO3
2. Fe2O3
3. Fe3O4
4. Fe2O3·3H2O

### Step 4: Compare Each Option with the Formula of Magnetite
- **Fe2CO3**: This is iron(II) carbonate, not magnetite.
- **Fe2O3**: This is iron(III) oxide, also known as hematite, not magnetite.
- **Fe3O4**: This is the correct formula for magnetite.
- **Fe2O3·3H2O**: This is hydrated iron(III) oxide, not magnetite.

### Step 5: Identify the Correct Answer
From the analysis, the only option that matches the chemical formula for magnetite is **Fe3O4**.

### Conclusion
The correct answer to the question "Which of the following is magnetite?" is **Fe3O4**.

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