A Liter is a measure of volume; a bar is a measure of pressure - your question is like asking how much does a foot weigh.
from grand exchange ~1.6k
about 1200gp each at last check.
None, the units are incompatible
You buy it at the grand exchange.
No you can not because they do not have a price tag, or a bar code.
Oren Bar-Gill has written: 'Consent and exchange' -- subject(s): Restitution
Silly question, at the Grand Exchange in Varrock.
It doesn't really matter what you use.
about 16% of a bar
1.25 bar
One liter of gas at 200 bar would expand to approximately 0.2 cubic meters (200 liters) if the pressure is reduced to atmospheric pressure (1 bar).