# Internal energy of Ideal gas

Ideal gases \(A\), \(B\), and \(C\) are contained in three different boxes which have exactly the same volume. The numbers of ideal gas molecules in box \(A\), \(B\), and \(C\) are \(6.02 \times 10^{23}\), \(12.04 \times 10^{23}\), and \(18.06 \times 10^{23},\) respectively. The temperatures of these gases are \(200\) K, \(300\) K, and \(400\) K, respectively. Then what is the ratio of the internal energy of these gases?