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For any gas, at most temperatures and pressures, the number of particles in a given volume is the same (based on the Ideal Gas Law -- see the Related Questions to the left for more information). The density is defined as the mass divided by volume, and therefore the density of a gas depends only on the mass of the particles. Since molecular oxygen is heavier than the average weight of air, which is largely composed of molecular nitrogen (which is lighter) and molecular oxygen, then oxygen is denser than air.
Based on the composition of air (see the Related Questions to the left), the average molecular weight of air is 28.97 grams per mole (which is dominated by the molecular weight of N2, which is 28.0134 g/mole because the atmosphere is nearly 80% N2). The molecular weight of oxygen, O2, is 32.0 grams per mole which is just slightly heavier. Therefore, oxygen is just slightly more dense than air, but not by much. In comparison, the molecular weight of helium, He, is only 4.003 g/mole, which is much lighter than air!
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air is made up of nitrogen, oxygen, argon, and carbon dioxide
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoUnder normal temperature and pressure, oxygen is a gas, therefore, its density is much less than that of water.
Under normal temperature and pressure, oxygen is a gas, therefore, its density is much less than that of water.
Under normal temperature and pressure, oxygen is a gas, therefore, its density is much less than that of water.
Under normal temperature and pressure, oxygen is a gas, therefore, its density is much less than that of water.
Wiki User
∙ 12y agoOxygen is less dense then water (H2O) when water is in its liquid form. A gas (oxygen) is less dense then a liquid (water). However, when water is in its gaseous form, it is less dense than air, and therefore oxygen, because water vapor rises during the process of evaporation.
Wiki User
∙ 13y agoBe more specific, what is "air" referring to?
Wiki User
∙ 14y agoOxygen is more dense than air. If you calculate the densities of air and oxygen, you will see that oxygen is more dense than air.
Wiki User
∙ 13y agoThat depends on what air you are speaking of? If it is the atmosphere of earth then.... Oxygen is slightly more dense than nitrogen, which makes up the vast majority of our air(78% or so).
Wiki User
∙ 14y agoUnder normal temperature and pressure, oxygen is a gas, therefore, its density is much less than that of water.
Wiki User
∙ 9y agoOxygen is more dense than air
Wiki User
∙ 14y agoyes
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Is ammonia more dense or less dense than air?
Yes ammonia is less dense than air
Is dry ice more or less dense than air?
It is more dense.
How are temperature and density of air related?
cold air has higher density, by hot air is opposite
What is true awarm is less dense than cooler air bwarm air is as dense as cooler air cwarm air has no density dwarm air denser than cool air?
Warm air is less dense than cooler air.
Will a balloon filled with oxygen rise?
it blows up
Why does less dense wood burn faster?
more space for air (oxygen)
If the volume of air is less then the less dense or more dense the air is?
its has more pressure
Is warm air less dense than cold air and moist air is more dense than dry air?
Warm air is less dense then cold air. But moist air is actually less dense than dry air because water vapor has a lower molecular weight than the oxygen and nitrogen that make up most of the atmosphere.
Is ammonia more dense or less dense than air?
Yes ammonia is less dense than air
Does the composition of air change from layer to layer?
yes, the air becomes less dense and there is less oxygen
What will less dense air do in a relation to more dense air?
if two fluids of different density meet the less dense one will rise over the more dense one.
Is cool air less dense?
No it is more dense than hot air
Why is it harder to breathe the higher you go up in the air?
There's less air. The air is less dense so you are getting less oxygen.
Statement correctly describes how the density and temperature of air are related?
Lower temperature air is more dense.
Why hydrogen gas collected by upward delivery?
Because hydrogen gas is less dense than air(mostly nitrogen and oxygen), and the less dense gas flows to go above the more dense(and escape the atmosphere).
Is the oxygen less at high altitudes?
Yes. Air is less dense at higher altitudes, so the oxygen is at a lower concentration.
Is higher air less or more dense?
less
