What is the chemical formula for potassium and selenium

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Melting 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.

What three things determine the shape and size of a puddle when water is poured out onto a surface