79570327

-4+4+6+12 = 30

x, 4+7+ 1 +6

ad+bc ^v “⁷    00

HdĆT n(C) =84

n(BuC) = n ( B) + n (C )-n (BnC)

_________ He = 4.002602    i

A Na *22.989769    U

_/    Ar = 39.948    * - F

M = 004676SI 3 OL

Hr»+3Hi ** 2NH, ** 2HI

w\ - -CO-CO;

»>->C_IMCVC*C +*£ ~>3Zn(OH),t2SbM, •2CjHa,4CaCJj*2H^) A

21rh

21r (r+h) 1r²h