Why were you not asked to predict whether or not an ion is polar?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

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.

Which of these is a physical property