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About what fraction of air is made of oxygen?
Oxygen makes up about 21% or approximately 1/5 of the air.
What percentage of oxygen can be found in air?
78% Nitrogen 20.5% Oxygen .5% Argon 1% Others for small calculations we take percentage of oxygen in air as 21%
How much do you breathe in and breathe out for oxygen?
the air is a mixture mainly of Nitrogen, around 80%, and a mixture of other gases including Oxygen and Carbon Dioxide (CO2). Only the oxygen is required for human breathing purposes, so you take in about 5 times the quantity of air as you need in order to get your oxygen supply. When the oxygen is used for 'internal combustion by the body's muscles, the by product is carbon dioxide which becomes part of the air you breath out. Plants don't actually breath but absorb CO2 in the process of photosynthesis, which requires light to operate, at which point the plant will release oxygen, but during the dark hours, it uses oxygen and puts out CO2.
How many moles of oxygen atoms are present in 5.00 moles of diphosphorous pentoxide?
Diphosphorus pentoxide has 5 oxygen atoms per molecule according to the given prefix. So, 5 moles of it will be 5 x 5 x (6.022x10^23) = 1.51x10^25 oxygen atoms.
Why was there more hydrogen gas than oxygen?
There is, for all practical purposes, no hydrogen in the Earth's atmosphere (somewhere around 50 parts per million). Oxygen makes up roughly 1/5 of the atmosphere.So, no. There is much more oxygen than hydrogen in the air.
What are the two gases which are present during inhaling and exhaling air?
We breathe in all gases present in the air. The two most abundant constituents of air are nitrogen and oxygen.
How much oxygen nitrogen carbon dioxide is there in the air you breathe out?
Oxygen---------- 4-5 % Carbon dioxide---------- 20% Nitrogen--------- 75%
How much oxygen will you need for a 5 gallon aquarium?
Air bubbles will do nothing. What is needed is a filter.
How much oxygen is needed in a 5 gallon tank?
If you are referring to Air pumped from an "aerator' Then the answer is "none". A filter is needed not an air pump.
About what fraction of air is made of oxygen?
Oxygen makes up about 21% or approximately 1/5 of the air.
What percentage of oxygen can be found in air?
78% Nitrogen 20.5% Oxygen .5% Argon 1% Others for small calculations we take percentage of oxygen in air as 21%
What are 5 examples of gases found at home?
5 examples of gases found in the normal home environment include; oxygen (air), nitrogen (most abundant element found in the air), carbon dioxide (air and the bubbles in fizzy drinks), argon in air and finally, methane if there is a gas supply, or propane or butane in fuel gas bottles. Carbon monoxide and SO2. are present in polluted air. You might have helium in a balloon.
Does oxygen make up 40 percent of the air?
No , it makes up 20.9% of air , almost 21%
number of atoms present in compound starch?
6 carbon, 10 hydrogen and 5 oxygen atoms
What is the concentration of oxygen in air exhaled?
There is 13-16% oxygen in expired air but it depends on your size. See the link below.
How much blood is present in humans body?
~5 liters
Why is there less oxygen in exhaled air then inhaled?
You breathe air for the oxygen and hydrogen, when you inhale chemical changes begin and you take in the oxygen and exhale carbon dioxide which things like plants then use to make more oxygen. You are not exhaling the same compound.
