a student spills a small amount of HCl into an aquarium containing 150 l of water reducing the ph from 7.35 to 3.60 what mass of Ca(OH)2 would have to be added to return the ph to its original value

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

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?