60% are active all the time.
No, hydrogen can only hold one bond and that's it. It only needs to be paired with one bond.
Answer: The average kinetic energy of the gas particles is greater in container B because it has a higher temperature.
Answer:Artificial light from cities has created a permanent "skyglow" at night, obscuring our view of the stars. Here's their map of artificial sky brightness in North America, represented as a ratio of "natural" nighttime sky brightness. In the black areas, the natural night sky is still (mostly) visible.
Explanation: