A volume of a gas weighing 8 g was allowed to expand at constant temperature until the pressure of the gas reduced to one-half of its former value. It was found that 500 mL of the rarefied gas weighed 1.25 g. (i) What was the original volume of the gas? (ii) Determine the density of the gas in g/L.

Explanation

To solve the problem step by step, we will break it down into two parts as per the question.

### Part (i): Finding the Original Volume of the Gas

1. **Understanding the Given Information**:
- The weight of the gas is 8 g.
- After expansion, the pressure of the gas is reduced to half of its original value.
- The weight of 500 mL of the rarefied gas is 1.25 g.
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