An anhydrous sample of caco3 (100.089 g/mol) weighing 0.9849 g was quantitatively transferred into a 250.0 ml volumetric flask half-full of nanopure h2o. one milliliter of 12m hcl was added & the solution was swirled. then the flask was filled to volume with nanopure h2o. what is the molarity (m) of the solution?

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.