How is the mass number of an isotope expressed in the name of an atom?

How many miles of water are produced if 5.43 mol pbo2 are consumed

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 can be found in the ionosphere