how did its discovery take place?
Swedish pharmacist Carl Wilhelm Scheele produced oxygen gas by heating mercuric oxide and various nitrates in 1771–2.
Oxygen
It is also commonly claimed that oxygen was first discovered by Swedish pharmacist Carl Wilhelm Scheele. He had produced oxygen gas by heating mercuric oxide and various nitrates in 1771–2.
what is tropical storm arlene (1981)? It was a rare off-season tropical cyclone. what is the physical structure of this above type of cyclone just mentioned? Its formation was unusual, originating from a tropical disturbance that crossed from the eastern Pacific Ocean into the Caribbean Sea; few Atlantic hurricanes develop in this manner. what is the seasonal variation seen in this last mentioned hurricane? Approximately 97 percent of tropical cyclones that form in the North Atlantic develop between the dates of June 1 and November 30 and the official end has shifted from its initial date of October 31. what kind of intensity it has? It is determined by either the storm's maximum sustained winds or lowest barometric pressure. what are the steering factors of this hurricane? The surrounding flow throughout the depth of the troposphere, the atmospheric flow affects the path of a hurricane across the ocean etc what is the composition of the above mentioned sphere? Nitrogen, oxygen, argon, carbon dioxide etc what are some early experiments regarding the second mentioned gas? Relationship between combustion and air, air is necessary for combustion, fire requires only a part of air etc
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Oxygen [SEP] Discovery
This discovery of Sendivogius was however frequently denied by the generations of scientists and chemists which succeeded him. It is also commonly claimed that oxygen was first discovered by Swedish pharmacist Carl Wilhelm Scheele. He had produced oxygen gas by heating mercuric oxide and various nitrates in 1771–2. Scheele called the gas "fire air" because it was then the only known agent to support combustion. He wrote an account of this discovery in a manuscript titled "Treatise on Air and Fire", which he sent to his publisher in 1775. That document was published in 1777. In the meantime, on August 1, 1774, an experiment conducted by the British clergyman Joseph Priestley focused sunlight on mercuric oxide (HgO) contained in a glass tube, which liberated a gas he named "dephlogisticated air".