To find the difference between the boiling points of oxygen and hydrogen, you can subtract the boiling point of hydrogen from the boiling point of oxygen.
The boiling point of oxygen is −182.9 °C, and the boiling point of hydrogen is −252.87 °C.
Calculating the difference: \[ \text{Difference} = \text{Boiling point of oxygen} - \text{Boiling point of hydrogen} = (-182.9) - (-252.87) \]
This simplifies to: \[ \text{Difference} = -182.9 + 252.87 = 69.97 \]
Thus, the difference between the boiling points of oxygen and hydrogen is 69.97.