Depends on how much pressure is left in the tank.
Duration of Flow = Oxygen Tank Conversion Factor * Remaining Tank Pressure (psi) / Continuous Flow Rate (L/min).
Conversion factor for D Tank = 0.16
Assuming you have a full tank 350 liters at 4000 psi flowing 5L/min
Duration = (.16*4000)/5 = 12.8 minutes
2 hours and 30 minutes at 4.5 liters 2 hours and 15 minutes at 5 liters
Depending on the flow rate. A G tank holds 5,300 liters of Oxygen. so just divide that buy the rate you are setting it to flow at. A non-rebreather at 15 lpm should last you close to 6 hrs. normally though the tank should be refilled before it gets down to around 200 psi, just to be safe.
It is not toxic but because it takes up space it can displace oxygen and we can't last long breathing an atmosphere without oxygen.
People release oxygen every minute, for as long as they live, and even for a time afterward. Living people release oxygen in the form of carbon dioxide. Much more importantly for the living, people take in and process oxygen all the time, in the form of O2.
There are two different types of oxygen tanks: Liquid and Gas. Both have pros and cons, but the pro for liquid tanks is you can carry a smaller tank and have more time, but there are some safety issues. The con for gas is, if you are a person on continuous oxygen, the tanks do not last long resulting in transporting more tanks which is also a safety issue.
An ML6 oxygen cylinder, when "charged" to normal pressures, holds 170 liters of oxygen. How long that will last depends on a number of factors. If the flow is set to 2 liters per minute continuous then it will last less than 1 and 1/2 hours. If an oxygen conserving device is used (they give the gas in pluses when breaths are taken) it can last over 4 hours.
A person can last 4 minutes without oxygen, longer in extreme cold. It takes that long for the body to use up the oxygen in the blood.
1 minute
A minute or less
one minute
It can last from a minute to 20 minutes depending on the pleasure.
it can last for as long as you can hold your breath. after that time you have 3 minutes before you pass out.
1 minute
1 minute
The Yellowstone Volcano did not last very long. It lasted for about a minute.
A long long long long llllllllllllllllllllllllllllllllooooooooooooooooooooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnggggggggggggggggggg time.
15 or 12 minute quarters in boys 25 or 20 minute halves in girls