Help help chem question

What is the number of moles in 15.0 g ash3?

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.

Explain that newton first law,second law and third law of motion?