Hello everyone. I am a college graduate perusing independent research of my own. I'm trying to figure out how to calculate how fast a specific gas (hydrogen) will rise from an initial velocity of 0 in room air and temperature. Basically, I'm trying to figure out how fast hydrogen would be traveling as it rose in a cylinder after electrolysis per given distance (do gasses reach terminal velocity?). Also, it would be helpful to be able to calculate the speed in a heavier gas if my experiment called for using a more inert gas.