21% o2
78% n2
<1% others
The composition of air depends upon altitude.
The usual state of oxygen and hydrogen: they are gases at room temperature.
gas composition in air is the sum of the gas individual element and that of the air i.e oxygen and nitrogen
Well, air contains 78.09% of Nitrogen, 20.95% of Oxygen, 0.03% of Carbon Dioxide and the rest of the gases like Argon, Helium, etc for about 1%. This composition of air is the same no matter where you go. If you're in Australia, the air will have this composition. If you're in South Africa, the air will have the same composition. The basic idea here is that the composition of air doesn't change which means air has a uniform composition. Homogeneous mixtures are those mixtures whose composition is same throughout the mixture and a heterogeneous mixtures are those mixtures whose composition is not same. Also, homogeneous mixtures are mixtures in which its components mix up thoroughly, i.e., the components cannot be observed whereas in a heterogeneous mixture, the individual components can be observed. In air, the Nitrogen or Oxygen cannot be observed separately. It is uniform and homogeneous. Thus, air is not a heterogeneous mixture.
Water and air
Phosphorus is one of the chemical elements and therefore has no "chemical composition" in the usual sense.
The composition of air depends upon altitude.
The composition is the same, the air is just less dense.
liquids and gasesare the usual states for a covalent bond at room temperature.
The usual state of oxygen and hydrogen: they are gases at room temperature.
The usual state of a covalent compound (at room temperature) is liquid.
gas composition in air is the sum of the gas individual element and that of the air i.e oxygen and nitrogen
The usual cause is when air is holding the maximum amount of water possible.
The usual state of oxygen and hydrogen: they are gases at room temperature.
On Air Canada, the usual amenities can be offered on a typical first class flight, including luxurious leg room, personal televisions, and better food.
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no