1) Pb(NO3)2
# of molecules:
# of elements:

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the answer is c

tell me if wrong