how long will it take 600ml of hydrogen gas to diffuse through a porous partition if 300 ml of oxygen diffuses through it in 10 min under identical conditions

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy