In the lungs, oxygen diffuses from the alveoli into the bloodstream through the process of gas exchange facilitated by differences in partial pressure.
oxygen
Oxygen (O2) diffuses the fastest in and out of body tissues due to its small size and high solubility. It is crucial for cell respiration and energy production in the body.
Gas exchange between the air and the blood occurs in the alveoli of the lungs. The alveoli are tiny air sacs where oxygen from the air diffuses into the blood and carbon dioxide from the blood diffuses into the air to be exhaled.
The rate of diffusion is inversely proportional to the square root of the molecular mass of the gas. Since the unknown gas diffuses 0.25 times as fast as helium, it means the square root of the molecular mass of the unknown gas is 4 times that of helium, thus the molecular mass of the unknown gas is 16 times that of helium, which is approximately 64 g/mol.
Gas diffuses in space.
Oxygen diffuses into cells. Carbon dioxide diffuses out.
Co2
In the lungs, oxygen diffuses from the alveoli into the bloodstream through the process of gas exchange facilitated by differences in partial pressure.
It spreads evenly throughout its containers/surroundings.
Oxygen diffuse faster.
Ammonia gas diffuses faster than hydrogen chloride gas due to its lower molar mass and higher diffusion coefficient. The lighter ammonia molecules move quicker and spread out faster than the heavier hydrogen chloride molecules in a given amount of time.
When a gas diffuses, it merely spreads out through the volume available to it. It will accordingly become less intense.
oxygen
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.
Ammonia diffuses faster than methane due to its lighter molecular weight and its smaller size. This allows ammonia molecules to move more quickly through a medium, such as air or another gas, compared to methane molecules.
Gas exchange for photosynthesis - CO2 from the air diffuses into the leaf, and 02 diffuses out of the leaf into the air