Unit 1: The Chemical Basis of Life
- Page ID
- 3735
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The following pages examine some of the principles of chemistry upon which an understanding of modern biology depends.
- 1.7: Molecular Weight and the Mole
- The weight of a molecule is the sum of the weights of the atoms of which it is made. The unit of weight is the dalton, one-twelfth the weight of an atom of C-12. Thus the molecular weight (MW) of water is 18 daltons.