which theory was proposed by the second scientist?
Theory of phlogiston
The theory of phlogiston
Scheele's study of the gas not yet named oxygen was prompted by a complaint by Torbern Olof Bergman, a professor at Uppsala University who would eventually become Scheele's friend. Bergman informed Scheele that the saltpeter he had purchased from Scheele's employer, after long heating, produced red vapors (now known to be nitrogen dioxide) when it came into contact with acetic acid. Scheele's quick explanation was that the saltpeter had absorbed phlogiston with the heat (had been reduced to nitrite, in modern terms) and gave off a new phlogisticated gas as an active principle when combined with an acid (even a weak acid).
oxygen (o2) is formed in photosynthesis as a direct result of Light-driven splitting of water during oxygenic photosynthesis how does lavoisier contribute? He conducted the first adequate quantitative experiments on oxidation and gave the first correct explanation of how combustion works what are its isotopes? They are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number what are its allotropes? UNANSWERABLE how is it stored? UNANSWERABLE is it toxic? No it is not toxic what are its industrial uses? UNANSWERABLE which scientist was involved in early experiments related to it? It was solated by Michael Sendivogius before 1604, but it is commonly believed that the element was discovered independently by Carl Wilhelm Scheele
Theory of phlogiston Theory of phlogiston. The theory of phlogiston.
Carl Wilhelm Scheele Carl Wilhelm Scheele Carl Wilhelm Scheele
The theory of phlogiston The theory of phlogiston The theory of phlogiston
. Although Scheele was unable to grasp the significance of his discovery of the substance that Lavoisier later named oxygen, his work was essential for the abandonment of the long-held theory of phlogiston. Scheele achieved astonishingly prolific and important results without the expensive laboratory equipment to which his Parisian contemporary Antoine-Laurent Lavoisier was accustomed. Through the studies of Lavoisier, Joseph Priestley, Scheele, and others, chemistry was made a standardized field with consistent procedures. Although Scheele was unable to grasp the significance of his discovery of the substance that Lavoisier later named oxygen, his work was essential for the abandonment of the long-held theory of phlogiston.  Although Scheele was unable to grasp the significance of his discovery of the substance that Lavoisier later named oxygen, his work was essential for the abandonment of the long-held theory of phlogiston.
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Carl Wilhelm Scheele [SEP] The theory of phlogiston
Scheele achieved astonishingly prolific and important results without the expensive laboratory equipment to which his Parisian contemporary Antoine-Laurent Lavoisier was accustomed. Through the studies of Lavoisier, Joseph Priestley, Scheele, and others, chemistry was made a standardized field with consistent procedures. Although Scheele was unable to grasp the significance of his discovery of the substance that Lavoisier later named oxygen, his work was essential for the abandonment of the long-held theory of phlogiston. Scheele's study of the gas not yet named oxygen was prompted by a complaint by Torbern Olof Bergman, a professor at Uppsala University who would eventually become Scheele's friend.