A mixture of helium, argon, and xenon gases are present in a container. What is the partial pressure of helium if the total pressure is 49.2 kPa and the partial pressure of Ar is 15.6 kPa and 21,4 kPa for Xe?

The characteristics 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 an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.