A sample of 10.5 g of nitrogen reacts with 20.2 g of hydrogen to produce ammonia. I need help on a-e. If you can explain know any, doesn't have to be all, that would be a great help! Please no files or links, thank you!

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.