Find the pH of a 0.79 M solution of NH3,a weak base, if it has a Kb of 4*10 -5

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

What is i fracture in the crust called when land move up, down or sideways

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?