mass divided by volume is density
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Oxygen packing density refers to the amount of molecular oxygen that can be contained in a given volume or space. It is commonly used in the context of oxygen storage systems, such as oxygen tanks or containers, to determine how much oxygen can be stored in a specific volume. The higher the oxygen packing density, the more oxygen that can be stored in a smaller space.
Close packing basically means that the atoms are so close together, that they can not get any closer to eachother. This means that the empty space between the atoms is minimized. Density is weight per volume, so the less empty volume there is, the higher the density will be.
The relative density of oxygen is approximately 1.43 times that of air at standard conditions. This means that oxygen is denser than air, which is why it can be collected by downward displacement.
Close packing basically means that the atoms are so close together, that they can not get any closer to eachother. This means that the empty space between the atoms is minimized. Density is weight per volume, so the less empty volume there is, the higher the density will be.
Close-packing is a term used to describe grains that fit tightly together with minimal space in between them. This arrangement maximizes the packing density of the grains.
Oxygen is less dense than selenium. Oxygen has a density of about 1.43 grams per cubic centimeter, while selenium has a density of about 4.81 grams per cubic centimeter.