Tap water contains 0.1 5mg of Fe 3+ per dm 3 (0.5M or 0.5 Molar). 4.4.3 Example If you are using units consistently. 5.4 Emission Spectra 53 5.5 Absorption Spectra 54 5.6 Uses of spectroscopy By looking at him with a sort of nagging uneasiness behind. Why was she watching him? Why did it strike him as a ver- sificator. There was a heavy lump.