It follows that the heat capacity of the gas is ⁠ 3 / 2 ⁠ N k B and hence, in particular, the heat capacity of a mole of such gas particles is ⁠ 3 / 2 ⁠ N A k B = ⁠ 3 / 2 ⁠ R, where N A is the Avogadro constant and R is the gas constant. Since R ≈ 2 cal /(mol · K), equipartition predicts that the molar heat capacity of an ideal gas is roughly 3 cal/(mol·K). This prediction is confirmed by experiment when compared to monatomic gases.