When the temperature of a gas is increased,does the degree of freedom change?

The ratio of total energy of all molecules of one mole of $O_2$ to the total energy of all molecules of two moles of $He$ at the same temperature is

How many degrees of freedom does a diatomic gas have due to its translational motion?

Define degree of freedom.

The value of $\gamma \left( = \frac{C_{p}}{C_{v}} \right)$ for hydrogen,helium,and another ideal diatomic gas $X$ (whose molecules are not rigid but have an additional vibrational mode) are respectively equal to:

What is the degree of freedom?