`O_(2)` gas at `STP` contained in a flask was replaced by `SO_(2)` under same conditions. The weight of `SO_(2)` will be

Options

A. Equal to that of `O_(2)`
B. Half that of `O_(2)`
C. Twice that of `O_(2)`
D. One-fourth of `O_(2)`

Explanation

To solve the question regarding the weight of \( SO_2 \) gas when it replaces \( O_2 \) gas at STP (Standard Temperature and Pressure), we can follow these steps:

### Step 1: Understand the conditions
- The question states that \( O_2 \) gas is contained in a flask at STP, which means the temperature is 273 K and the pressure is 1 atm.
- The same conditions apply when \( SO_2 \) replaces \( O_2 \).

### Step 2: Apply Avogadro's Law
- According to Avogadro's Law, under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules.
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