The heat of vaporization for protactinium is 481 kJ/mol. The entropy of vaporization is 109 J/K mol. Calculate the boiling point of protactinium. Compare with the actual value of approximate of 4500 K.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?

An unknown insoluble substance displaced the water shown. it's mass is indicated on the triple beam balance. mass = a. 694 b. 693.5 c. 693.0 d.693.8