Discard the water layer, which contains the aspirin or acetominophen) and evaporate the chloroform layer to dryness under gentle heat. The result is codeine base, a white crystalline powder. Combine 20 mL pyridine and 25 mL conc. HCl in a beaker and heat strongly to 190C to drive off any water.
A simple sentence usually consists of a single finite clause with a finite verb that is independent. More complex sentences may contain multiple clauses. Main clauses (i.e. matrix clauses, independent clauses) are those that can stand alone as a sentence. Subordinate clauses (i.e. embedded clauses, dependent clauses) are those that would be awkward or incomplete alone.
A clause is a group of words containing a subject and a verb or verb phrase. Though an independent clause expresses a complete thought, a dependent clause (also known as a subordinate clause) does not. In other words, a dependent clause cannot stand as a sentence by itself.It must be combined with one or more independent clauses to form a sentence.hough an independent clause expresses a complete thought, a dependent clause (also known as a subordinate clause) does not. In other words, a dependent clause cannot stand as a sentence by itself. It must be combined with one or more independent clauses to form a sentence.