The composition of normal atmospheric air is N2 - 78%, O2 - 21% and other miscellaneous gasses make up the balance. SO,
Any O2 concentration greater than 22-23% would be O2 considered enriched.
75% nitrogen, 21% oxygen, 3% other gases.
No oxygen in space. We need oxygen.
Sulphur + oxygen = Sulphur Oxide
Because the mass of carbon is not the same as that of oxygen.
Well, for starters, oxygen is used by every living organism for their very essence of life. Humans need oxygen to make energy and plants need carbon dioxide, which contains the element oxygen, to make energy. As a tool, oxygen is very flammable so it is also used in some high-heat related jobs.
a properly calibrated oxygen monitor reading 23.9% oxygen
autotrophic prokaryotes enriched the atmosphere with oxygen in the precambrian era :) hope this helps
Air is the mixture of gases that surrounds the Earth. The composition of the earth's atmosphere varies with altitude, but at sea level contains approximately 78% nitrogen and 21% oxygen by volume.An oxygen-deficient atmosphere contains less than 19.5% oxygen by volume.An oxygen-enriched atmosphere contains more than 23.5% oxygen by volume.
19.50%
There is no indication at present that the concentration of oxygen in the atmosphere is declining.
leaking oxygen cylinders and liquid oxygen systems in the immediate area
Approximately 20%.
The oxygen concentration in the atmosphere today (which is at about 21%) has been at its current level for the past 400 million years.
life arose and the atmosphere became enriched in oxygen
yes
too high a concentration of oxygen in the atmosphere
Nitrogen has the highest i.e. 78% concentration in the atmosphere. On the second spot lies oxygen with a concentration of about 21%.