Odpowiedzi

2009-10-21T23:57:24+02:00
C₃H₇OH
3×12=36
8×1=8
16
36+8+16=60
%C=36/60 ×100%=60%
%H=8/60 ×100%=13.3%
%O=16/60 ×100%=26.7%
7 4 7