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The lone electron in NO 2 also means that this compound is a free radical, so the formula for nitrogen dioxide is often written as • NO 2. The reddish-brown color is a consequence of preferential absorption of light in the blue region of the spectrum (400–500 nm), although the absorption extends throughout the visible (at shorter ...
A lifting gas or lighter-than-air gas is a gas that has a density lower than normal atmospheric gases and rises above them as a result, making it useful in lifting lighter-than-air aircraft. Only certain lighter than air gases are suitable as lifting gases. Dry air has a density of about 1.29 g/L (gram per liter) at standard conditions for ...
NO 2 also reacts with ozone to form nitrate radical NO 2 + O 3 → NO 3 + O 2. During the daytime, NO 3 is quickly photolyzed back to NO 2, but at night it can react with a second NO 2 to form dinitrogen pentoxide. NO 2 + NO 3 (+M) → N 2 O 5 (+M). N 2 O 5 reacts rapidly with liquid water (in aerosol particles or cloud drops, but not in the ...
It is an oxidising agent roughly equivalent to hydrogen peroxide, and much stronger than molecular oxygen. Nitrous oxide is not flammable at low pressure/temperature, but at about 300 °C (572 °F), its breakdown delivers more oxygen than atmospheric air. It often is mixed with another fuel that is easier to deflagrate.
Nitrogen dioxide from open flames can be a serious health risk.
Negative air ions (NAI) are important air component, generally referring to the collections of negatively charged single gas molecules or ion clusters in the air. They play an essential role in maintaining the charge balance of the atmosphere. [1] [2] The main components of air are molecular nitrogen and oxygen.
A local authority report on the zone's impact said the city had some of the highest levels of nitrogen dioxide (NO2) outside of London, with poor air quality responsible for about 900 premature ...
This is a problem, the researchers said, because NO2 exposure over time can make asthma attacks worse and has been linked to affecting children's lung development.