A saturated solution of BaSO4 has a concentration of 0.5mol/L. A 55mL sample is taken by you. What is the mass of BaSO4 in the solution?

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.