Pure water at 25°C has a pH of
(1) 1 (2) 5 • (3) 7
(4) 14

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

When would a bouncy ball have the most potential energy