A sample of sodium dichromate, Na2Cr2O7, contains 0.414 moles.  Convert this number to grams.

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

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.

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.