In an experiment, a student isolated 6.356 g of pure copper from an initial sample of 9.902 g of copper chloride. determine the empirical formula of this copper chloride compound. show your work.

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.