system
Given the following post, respond as if you're commenting on Reddit:
human
Would you suffocate if a snorkel was too long?

On the atomic level CO2 is heavier than just O2, so there might be enough to reason that if you had a thirty foot long snorkel above water, while you're beneath, the CO2 would pool. But is that really how it would work, I mean there's more in air than just those two gasses. Help me out?

EDIT: Since a lot of this is about water pressure, let's say you're above ground, encapsulated in some kind of solid, with lungs fully expanded, with a hole leading to the chest to allow air in. Would you still suffocate?
gpt
You would survive as long as you were very careful to abide by the following rules: 

1)Go close to the surface of the water. You won't be able to breather  30ft under due to pressure, but you will be able to breather at 1ft under with a 30ft snorkel.   

2)**Do not breathe out into your snorkel**. This is the solution to the second biggest problem, that breathing CO2 out into the bottom of the tube would hinder the rate at which oxygen reaches you. 


All you would need to do to survive is breathe out through your nose and you would be able to live.