The vapor density of oxygen is calculated by dividing its molar mass by the molar mass of hydrogen gas.
According to the reference, the vapor density of a gas can be calculated using the following formula:
Vapour density of a gas = (molar mass of the gas) / (molar mass of hydrogen gas of same volume)
Here's how to apply this to oxygen:
- Molar Mass of Oxygen (O₂): The molar mass of oxygen is approximately 16 atomic mass units (amu), but since oxygen is diatomic, the molar mass of O2 is approximately 32 amu (16 x 2). The reference states the molar mass is ~ 16, but this is for an oxygen atom (O), not the diatomic form of oxygen (O₂).
- Molar Mass of Hydrogen (H₂): The molar mass of hydrogen gas (H₂) is about 2. The reference uses 2.
- Calculation: The vapour density of oxygen can therefore be calculated as approximately 32 / 2 = 16.
Therefore, the vapour density of oxygen is 16.
While the reference states that vapour density of oxygen is 16/2 = 8, this uses 16 for the molar mass of Oxygen. The correct molar mass for oxygen gas (O2) is 32.
In summary,
| Gas | Molar Mass (amu) | Vapour Density |
|---|---|---|
| Hydrogen (H₂) | 2 | 1 |
| Oxygen (O₂) | 32 | 16 |
