12 gm of Mg (At. mass 24) will produce MgO equal to:

Options

A. 0.03 mole
B. 30 mole
C. 0.5mole
D. 5 mole

Explanation

To determine how much magnesium oxide (MgO) is produced from 12 grams of magnesium (Mg), we can follow these steps:

### Step 1: Write the balanced chemical equation
The reaction between magnesium and oxygen to form magnesium oxide can be represented as:
\[ 2 \text{Mg} + \text{O}_2 \rightarrow 2 \text{MgO} \]

### Step 2: Calculate the number of moles of magnesium
To find the number of moles of magnesium in 12 grams, we use the formula:
\[ \text{Number of moles} = \frac{\text{Given mass}}{\text{Molar mass}} \]
The molar mass of magnesium (Mg) is 24 g/mol.
So, we calculate:
\[ \text{Number of moles of Mg} = \frac{12 \text{ g}}{24 \text{ g/mol}} = 0.5 \text{ moles} \]

### Step 3: Relate moles of magnesium to moles of magnesium oxide
From the balanced equation, we see that 1 mole of magnesium produces 1 mole of magnesium oxide. Therefore, if we have 0.5 moles of magnesium, it will produce:
\[ 0.5 \text{ moles of MgO} \]

### Conclusion
Thus, 12 grams of magnesium will produce 0.5 moles of magnesium oxide (MgO).

### Final Answer
The amount of MgO produced is **0.5 moles**.

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