A chamber of volume V is evacuated by a pump whose evacuation rate equals C. How soon will the pressure in the chamber decrease by `eta(eta gt1)` ?

Explanation

To solve the problem of how soon the pressure in a chamber will decrease by a factor of \( \eta \) (where \( \eta > 1 \)), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Initial Conditions**:
- Let the initial number of moles of gas in the chamber be \( x \).
- The initial pressure in the chamber is \( P_0 \).
- The volume of the chamber is \( V \).
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