The following observations were all made of an unknown substance in a laboratory. Which of these is a physical property? Group of answer choices

Non-reactive with water

Ability to burn

Reactivty with acid

Density of the substance is 1.75 g/mL

In 2002, the rare earth elements mine in mountain pass, california was closed because

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)