if two events A&B are such that pr(A) is not zero and pr(B) is not zero, what combinations of independent (I),not independent (NI), mutually exclusive (M),and not mutually exclusive (NM)are permissible?in other words, which of thebfour combinations (I, M),(NI, M),(I, NM),and (NI, NM) are permissible? construct an example for the those combinations that are permissible.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.