Enter the appropriate symbol for an isotope of potassium-39 corresponding to the isotope notation a/z x

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Freezing 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.

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.