3. Please fill in the following table Sample Final Final Volume of Concentration Volume of stock Concentration solution of stock solution needed (c2, %) solution (V2, mL) (V1, mL) (c1, %) Standard A 60 100.0 100 Standard B 40 100.0 60 Standard C 20 100.0 40 Table 3: standard solution preparation

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.