CO₂

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H₂O

 Of course, we call this "chemical" water!

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NH₃

_{Remember that Am is the symbol of the radioactive chemical element americium, not the formula of the compound ammonia!}

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BF₃

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CCl₄

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HCl

(pure substance - a gas)

hydrogen chloride

NOTE:  hydrochloric acid is the name of the solution formed when HCl gas is dissolved in water.

ammonia

Do not call it "nitrogen trihydride!"  In industry, the term "anhydrous ammonia" is often used to refer to the pure compound, to distinguish it from the solution formed when it is dissolved in water.  This solution is often called "aqueous ammonia" or (incorrectly) "ammonium hydroxide."