What are some differences you can observe in the two samples of phosphorus? What explanation can you suggest for how two substances that look so different can be both made entirely of the same kind of atom?

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Is a pencil falling to the floor anon contact force, a force, or a contact force