What is PbCl2 in the following equation? 2AlCl3(aq) + 3Pb(NO3)2(aq) — 3PbCl2cs) + 2Al(NO3)3(aq) O soluble in water
O a spectator ion
O a solid
O a sublimate

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

What is the percent by mass of oxygen in fe2o3