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21% of air is pure oxygen

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Facts about the element oxygen?

is the element with atomic number 8 and represented by the symbol O.Because it comprises most of the mass in water, oxygen comprises most of the mass of living organisms (for example, about two-thirds of the human body's mass)Oxygen is a member of the chalcoqen groupof the periodic table.


Oxygen is the most abundant element in?

As mass percentage oxygen is the most abundant.


Is collagen the most abundant protein in the body?

Phosphorus


Percentage of oxygen in air?

Oxygen comprises about 21% of fresh air. Room air is nearly always refreshed from outsides sources sufficiently fast for this value to hold true. However, if ventilation is extremely poor it can differ.


What is the percentage of aluminum in the Earth's crust?

Aluminum makes up about 8% of the Earth's crust by weight, making it the third most abundant element in the Earth's crust after oxygen and silicon.


What element is the second most abundant in the body?

Most of our body is made up of water (H20); therefore hydrogen is the most abundant (i.e. numerous) element and oxygen is the second most abundant. However, since oxygen is much heavier than hydrogen, it comprises a larger percentage of body weight (about 65%) than does hydrogen (about 10%).


Which component of mammalian blood is most directly involved in the transport of oxygen?

Iron found as part of hemoglobin which comprises most of each red blood cell (RBC).


Which is the most accurate fraction for the amount of oxygen contained in earth's armosphere about 1 5 2 3 or 3 4?

The most accurate fraction for the amount of oxygen in Earth's atmosphere is about 1/5. Oxygen makes up about 21% of the Earth's atmosphere.


What is the three most common atmosphere gases on earth?

The three most common gases in Earth's atmosphere are nitrogen (N2), oxygen (O2), and argon (Ar). Nitrogen makes up about 78% of the atmosphere, oxygen comprises about 21%, and argon is present at about 0.93%.


What is the percentage of oxygen in plasma?

There is less than 2%. Most is found bound to hemoglobin.


The two most abundant gases in the atmosphere are?

Nitrogen and oxygen are the two most abundant gases in Earth's atmosphere, making up approximately 99% of its composition. Nitrogen comprises about 78% of the atmosphere, while oxygen makes up around 21%.


What chemical compound makes up a large percentage of most living things and is essential for life as you know it?

oxygen