What is meaning of H2O and compound

A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. ... For example, water (H2O) is a compound consisting of two hydrogen atoms bonded to an oxygen atom.

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

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gokuson

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.