Stanley Miller set out to test the hypothesis that the chemicals that Harold Urey proposed were present in Earth's early atmosphere could recombine through chemical reactions to produce organic molecules required for life on this planet. The reactant in Stanley Miller's experiment would need to form new chemical bonds in order to result in new products being made.

the idea of an abiotic synthesis of organic compounds, in the origin of life may be near volcanoes, which wee present in the early stage

Explanation:

The miller and Urey experiment was a chemical reaction that resulted in the conditions present on earth and tested for the primitive earth that favored the chemical reactions that were similar to more complex organic compounds and was considered to be the classical abiogenesis of 1952. The reactants used were water, the methane the ammonia, and the hydrogen. The evidence form this was that the Earth's early atmosphere was different from the air used in the experiment and a recent experiments also produce by these organic molecules.