Oxygen is present in a 1 litre flask at a pressure of `7.6 xx 10^(-10) mm` of Hg. Calculate the number of oxygen molecules in the flask at `0^@C`

Explanation

To solve the problem of calculating the number of oxygen molecules in a 1-litre flask at a pressure of \(7.6 \times 10^{-10}\) mm of Hg and a temperature of \(0^\circ C\), we can follow these steps:

### Step 1: Convert the pressure from mm of Hg to atm
We know that:
\[ 1 \text{ atm} = 760 \text{ mm of Hg} \]
Thus, we can convert the given pressure:
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