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On average, oxygen (O2 which is 2 oxygen atoms) makes up about 20-21% of air. The bulk of the rest of it is Nitrogen (N2 which is 2 nitrogen atoms) (about 78%).
Oxygen has a molecular weight of about 16 per atom. Nitrogen has a molecular weight of about 14 per atom. Pure Oxygen gas is thus heavier than "air."
For example:
Say you had a sample of air containing 8 Nitrogen atoms and 2 Oxygen atoms (80% N2, 20% O2). Based on atomic weight, it would come in at 150. (150 is calculated by multiplying the 8 nitrogen atoms by = 112, and then multiplying the 2 oxygen atoms by 16 = 32, and adding 112 and 32 together = 150).
If you had the same amount of pure oxygen gas (O2), you would have 10 oxygen atoms times 16 = 160.
So as a rough approximation, if the weights of oxygen gas = 160 and air = 150, air is approximately 93.75% the weigh of oxygen gas.. or in other words, "air" is approximately 6.25% lighter than pure oxygen gas.
What else can I help you with?
What diffuses faster air or oxygen gas why?
Oxygen gas diffuses faster than air because oxygen molecules are smaller and lighter than the molecules of air, which is mostly composed of nitrogen and oxygen. This allows oxygen molecules to move more quickly through a medium, such as air or other gases.
Is diffuses faster air or oxygen gas?
Oxygen gas diffuses faster than air because air is a mixture of gases that includes nitrogen, oxygen, carbon dioxide, and other gases, which can affect the overall diffusion rate. Oxygen, being a pure gas, has a higher diffusion rate compared to air.
Is oxygen more dense or less dense then air?
Oxygen is slightly more dense than air. The density of oxygen at room temperature is approximately 1.429 grams per liter, while the density of dry air is around 1.225 grams per liter. This is due to the fact that oxygen molecules (O2) have a higher molecular weight than the average molecular weight of air.
What is the name of the gas that you breathe in from the air?
The gas you breathe in from the air is called oxygen.
What is the mole fraction of oxygen gas in air?
The mole fraction of oxygen gas in air is approximately 0.21. This means that out of every 1 mole of air, 0.21 moles are oxygen gas molecules.
What diffuses faster air or oxygen gas why?
Oxygen gas diffuses faster than air because oxygen molecules are smaller and lighter than the molecules of air, which is mostly composed of nitrogen and oxygen. This allows oxygen molecules to move more quickly through a medium, such as air or other gases.
What kind of air is heavier than another type of air?
Gas is heavier than oxygen. Cold air is heavir than hot air
Is diffuses faster air or oxygen gas?
Oxygen gas diffuses faster than air because air is a mixture of gases that includes nitrogen, oxygen, carbon dioxide, and other gases, which can affect the overall diffusion rate. Oxygen, being a pure gas, has a higher diffusion rate compared to air.
What is one gas found in the air other than oxygen and carbon dioxide?
nitrogen
What gas do we breath?
This gas is oxygen from air.
Is Jupiter air or gas?
air with no oxygen
The type of gas that is released into the air after photosynthesis?
Plants release oxygen into the atmosphere as a by-product of photosynthesis.
What gas in air has more than one atom?
Oxygen, nitrogen, argon have diatomic molecules.
What is the name of the gas that you breathe in from the air?
The gas you breathe in from the air is called oxygen.
What is an example of a gas gas solution?
Air. (Oxygen, Carbon Dioxide)
Is oxygen more dense or less dense then air?
Oxygen is slightly more dense than air. The density of oxygen at room temperature is approximately 1.429 grams per liter, while the density of dry air is around 1.225 grams per liter. This is due to the fact that oxygen molecules (O2) have a higher molecular weight than the average molecular weight of air.
What gas is released into the air as a by-product of photosynthesis?
Oxygen! AKA: The air we breathe.
