Atomic Number 54 The element symbol is ,

(Be careful: the symbol must be written correctly.)
PLS HEL

After cloud droplets form, what must happen to them for precipitation to occur?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?