A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 ml of stock solution. A 10.00 ml sample of this stock solution is added to 50.00 ml of water. Calculate the concentration (in molarity) of ammonium ions and sulfate ions in the final solution

What three things determine the shape and size of a puddle when water is poured out onto a surface

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false