Calculate the number of gaseous molecules left in a volume of `1 mm^(3)` if it is pumped out to give a vacuum of `10^(-6)mm Hg` at `298 K`.

Explanation

To solve the problem of calculating the number of gaseous molecules left in a volume of `1 mm³` when pumped out to give a vacuum of `10^(-6) mm Hg` at `298 K`, we can follow these steps:

### Step 1: Convert Pressure from mm Hg to atm
Given:
- Pressure, \( P = 10^{-6} \, \text{mm Hg} \)

We know that:
- \( 1 \, \text{atm} = 760 \, \text{mm Hg} \)
...