11.   They are not normally thought of as potassium nitrate molecules existing as single entities outside the solid lattice.

12.   They each exist as an organic entity, with an internal dynamic.

13.   When humans die they are not reborn, but exist only as cold empty shadows.

14.   The mind exists as a separate entity.

15.   For organizational participants in normal circumstances, such alternatives are inevitably restricted by their experience and the tendency to take what exists as natural, though constraining.

16.   In order that tables can be joined, the value of the foreign key must exist as a primary key in another relation or be null.

17.   Carbon, for example, exists as diamond or graphite.

18.   White phosphorus exists as molecular crystals.

19.   It exists as a macromolecular layer lattice.

20.   The mean bond enthalpy of an element or compound which exists as diatomic molecules is exactly the same as its bond dissociation enthalpy.