Suppose your drinking water was tested and found to contain 0.005 ppm of arsenic, 0.002 ppm of benzene, 0.010 ppm of cadmium, and 0.400 ppm of cyanide. Which chemicals were above the acceptable concentrations for drinking water?

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution

What substance has a mass of 9.5g and volume of 2.1cm^3

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.