A complex sentence has one independent clause and at least one dependent clause. An independent clause (unlike adependent clause) can stand alone as asentence. Below are examples of complex sentences. In each example, the independent clause is shaded. The dependent clause is unshaded. 1  Stay in the bath until the phone rings.  The car swerved to miss Mrs Jackson, who had slipped off the pavement.
John Dalton was the first to recognize that the total pressure of a mixture of gases is the sum of the contributions of the individual components of the mixture. By convention, the part of the total pressure of a mixture that results from one component is called the partial pressure of that component.
Dalton was an English chemist and teacher who used experimental evidence to form the atomic theory of matter: 1  All elements are composed (made up) of atoms. 2  All atoms of the same element are alike. 3  Atoms of different elements are different. 4  Atoms of different elements combine to form a compound. These atoms have to be in definite whole number ratios. For example, water is a compound made up of 2 atoms of hydrogen and one atom of oxygen. (A ratio of 2:1) Three atoms of hydrogen and 2 atoms of oxygen cannot combine to make water. Chemical reactions occur when atoms are separated, joined, or rearranged.