<Dl> <Dd> N (12 u) = 0.012 kg / mol, or </Dd> <Dd> N u = 0.001 kg / mol </Dd> </Dl> <Dd> N (12 u) = 0.012 kg / mol, or </Dd> <Dd> N u = 0.001 kg / mol </Dd> <P> Molecular masses of proteins are often expressed in daltons . For example, a molecule of a protein with molar mass 7004640000000000000 ♠ 64 000 g ⋅ mol has a mass of 64 kDa . </P>

In atomic mass units amu what is the mass of an electron