C 9 BIOMOLECULES
fraction. Therefore elemental analysis gives elemental composition of living tissues in the form of hydrogen, oxygen, chlorine, carbon etc. while analysis for compounds gives an idea of Element % Weight of Earth’s crust Human body Hydrogen (H) 0.14 0.5 Carbon (C) 0.03 18.5 Oxygen (O) 46.6 65.0 Nitrogen (N) very little 3.3 Sulphur (S) 0.03 0.3
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