How many moles of PbNo3 contain 6.022x10^23

What are transitions between a liquid and gas called? identify which way they are transitioning

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.

The fact that the total amount of energy in a system remains constant is a(n)