Arrange the following in order of increasing density:
(a) Oxygen at `25^(@)C`, `1 atm`, (b) Oxygen at `0^(@)C`, `2 atm`, (c) Oxygen at `273^(@)C`, `1 atm`

Explanation

To solve the problem of arranging the densities of the given oxygen conditions in order of increasing density, we will use the formula for density derived from the ideal gas law:

1. **Understanding the Ideal Gas Law**:
The ideal gas law is given by the equation \( PV = nRT \), where:
- \( P \) = pressure
- \( V \) = volume
- \( n \) = number of moles
- \( R \) = universal gas constant
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