Solve
A vessel contains X number of molecules of hydrogen gas at a certain temperature and pressure. How many molecules of nitrogen gas would be present in the same vessel under the same conditions of temperature and pressure ?

Explanation

To solve the problem of how many molecules of nitrogen gas would be present in the same vessel under the same conditions of temperature and pressure as a given number of hydrogen gas molecules (X), we can use the principles of the ideal gas law and Avogadro's law.

### Step-by-Step Solution:

1. **Understanding the Ideal Gas Law**:
The ideal gas law states that \( PV = nRT \), where:
- \( P \) = pressure
- \( V \) = volume
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