Asap 10 ! which of the following families contains liquids, solids, and gases?
a. the alkali metals
b. the noble gases
c. the halogens
d. the alkaline earth metals

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump