How much energy is released when 0.60 μg of ³H have decayed to ³He? The mass of ³He is 3.0160293 u, the mass of ³H is 3.0160492 u, 1 u = 931.5 MeV/c², 1 eV = 1.60 × 10⁻¹⁹ J, and NA = 6.022 × 10²³ molecules/mol.