Depends on the size of the tank.
Depends on the size of the tank.
Different scuba gear types weigh different amounts. The oxygen tank is the heavy part of the scuba diving gear.
about 32 pounds empty
The pressure will increase
I would think so, because there are two of them mixed together. Air in a scuba tank or anywhere else should be heterogeneous. A scuba tank filled with either oxygen or nitrogen would be homogeneous.
It can feel warmer than a half filled tank (especially when it has just been filled) because of all of the molecular activity in the tank and some of this is transferred in to heat energy.. If the tank is left for some time it will drop in temperature to the point where it is similar to the half filled tank. The reason it is warm when it has just been filled is simply down to the hear from the compressor and the friction caused by the air molecules as they enter the tank.
All you need is a hose that connects to the tank and a valve to regulate it. However a 4500 psi compressor is much, much more expensive than either getting the tank filled by itself, or buying a scuba tank to refill from.
21.
The numbers on a scuba tank reveal 3 things. Serial no. of the tank. Type metal. and the current hydro date.
Something not everyone takes into account is that every molecule has a weight, even the molecules that make up air. It may not be noticeable, but it's definitely present. So if by "empty tank" you mean "a tank containing no molecules", and it were compared to a tank filled with air, or "a tank containing at least one molecule", then you can see that a tank filled with air will weigh more than an empty tank (although the difference may be very very small).
One-fifth of the tank
From a regulator attached to a scuba tank.