Pumice is volcanic rock that contains many trapped air bubbles. a 225 gram sample occupied 236.6 ml. what is the denisty of pumice.

What is the mass of 8 moles of sodium atoms

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?