[DOC] [TLE] If the air is 78% nitrogen and 21% oxygen, why do we say we ... [PAR] We breathe in everything, whether it's good, bad or useless. If it's a gas or 
suspended ... But it is the O2 in air that is absorbed (partly) in blood by 
haemoglobin, ... However, the nitrogen we breath is not used in our body, and 
thus we exhale the ... have used nitrogen as our oxygen (given >70% of air is N) 
and if not, why not? [DOC] [TLE] How is it possible that we inhale only oxygen from the atmosphere ... [PAR] It isn't possible. (grin) When you inhale, you inhale the entire mix of gases in the 
atmosphere. ... Most of this gas is Nitrogen (N2) at around 80%, which is es. ... 20
% of oxygen gas (O2) inhaled, you extract a small percentage and breathe back 
out a ... covered cilia (nose hairs) that solid particles can latch onto, but not gases
. [DOC] [TLE] Why don't we breathe nitrogen when it makes most of the air? [PAR] Apr 25, 2014 ... Why do we always tend to breathe oxygen, not hydrogen and nitrogen? ... Air that 
we inhale (at sea level) is about 78% N 2 , 20.9% O 2 , 1% argon, ... Animals use 
oxygen as a chemical energy source because oxygen gas can react with ... Both 
carbon and nitrogen can be made to react with oxygen, but... [DOC] [TLE] Why Do We Breath Oxygen And Not Nitrogen? - Naked Science Forum [PAR] Why we evolved to use oxygen, I'm not sure but I would guess it would ... gas is 
the main source of the chemical energy that air-breathing ... There are two 
hydrogens for every oxygen, and a molecular formula of (Cm(H2O)n). [DOC] [TLE] The Air We Breathe [PAR] What is in the air that we breathe? Can air be ... Air is a mixture of Nitrogen, 
Oxygen, Argon, Carbon Dioxide, ... Sulfur dioxide in the air should not exceed 
30 ppb = ... e.g. Helium He; Nitrogen N. .... C and H (e.g. natural gas=methane, 
CH4; Gasoline has a mix ... Ozone (secondary pollutant: not produced directly but 
as the. [DOC] [TLE] The air that we breathe is mostly not oxygen but this gas, N # Quiz ... [PAR] Jul 8, 2016 ... The air that we breathe is mostly not oxygen but this gas, N # Quiz # Question ... It 
makes up about 21% of the air we breathe # Quiz # Question. [DOC] [TLE] We would like to know if oxygen is lighter or heavier than air [PAR] Air is a mixture of gases, mostly nitrogen and oxygen ... Air is well mixed, so we 
do not usually talk about oxygen being lighter or heavier than air. ... This isn't 
because the nitrogen is denser but that the cold gas (N2) is denser than the warm 
... You generally don't notice that you are getting less oxygen per breath until you 
get... [DOC] [TLE] If you took an element out of air, would it still be considered air? [PAR] An element can move from one phase to another, and is considered a gas, ... For 
example, the air is mostly nitrogen, in the form of N2, with a lot of oxygen (O2) ... 
Sometimes the air outside is very dry, but other times it is a lot more wet and 
humid. ... breathe in the room (we take in the oxygen from air to respirate) and no 
fires... [DOC] [TLE] Air we breathe: Air Composition - Chemistry Land [PAR] Mar 4, 2013 ... Nitrogen gas can't be seen but when it is cooled to -320 F (-195C) it ... Others 
have two nitrogens and one oxygen (N2O), one nitrogen and two ... Actually, this 
atmosphere would be pure oxygen, which is not good to breath for .... What is 
mostly seen are lot of small particles of clear silica (

Question: The air that we breathe is mostly not oxygen but this gas, N
Answer: nitrogen