Calculate the mass in gm of 2g atom of Mg-

Options

A. 48 g
B. 84 g
C. 78 g
D. 87 g

Answer

To calculate the mass in grams of 2 gram atoms of Magnesium (Mg), we can follow these steps:

### Step 1: Understand the concept of gram atoms
A gram atom (or mole) of an element is the amount of that element that contains Avogadro's number (approximately \(6.022 \times 10^{23}\) atoms) of atoms and has a mass equal to its atomic weight in grams.

### Step 2: Find the atomic mass of Magnesium
The atomic mass of Magnesium (Mg) is approximately 24 grams per mole.

### Step 3: Calculate the mass of 1 gram atom of Magnesium
Since 1 gram atom of Mg has a mass of 24 grams, we can express this as:
\[ \text{Mass of 1 gram atom of Mg} = 24 \text{ grams} \]

### Step 4: Calculate the mass of 2 gram atoms of Magnesium
To find the mass of 2 gram atoms of Mg, we simply multiply the mass of 1 gram atom by 2:
\[ \text{Mass of 2 gram atoms of Mg} = 2 \times 24 \text{ grams} \]
\[ \text{Mass of 2 gram atoms of Mg} = 48 \text{ grams} \]

### Conclusion
Thus, the mass of 2 gram atoms of Magnesium is 48 grams.

### Final Answer
The mass in grams of 2 gram atoms of Magnesium (Mg) is **48 grams**.

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