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Oxygen
Beginning of essay
is required for the release of energy from food molecules (aerobic respiration). Instead of breaking down food molecules completely, muscle cells switch to a form of partial breakdown that does not require (anaerobic respiration) so that they can continue to generate energy. This partial breakdow ....
Middle of essay
.... makes up 20.95% of the volume of dry air. Diatomic is colorless, odorless, and tasteless.
Two 18th-century scientists share the credit for first isolating elemental : Joseph PRIESTLEY (1733-1804), an English clergyman who was employed as a literary companion to Lord Shelburne at the time of his most significant experimental work, and Carl Wilhelm SCHEELE (1742-86), a Swedish pharmacist and chemist. It is generally believed that Scheele was the first to isolate , but that Priestley, who indepen.... |
| Number of words: 2741 |
Approximate pages: 10 |
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