Odpowiedzi

2010-03-07T17:13:58+01:00
S SO2
640 g
M=32g/mol M=2*16+32=64g/mol


x-------640
32-------64
x=320g S

Zad.2
M AL2O3
M=27*2+3*16=54+48=102g/mol
%Al= 54/102*100%=52,94%
%O=48/102*100%=47,06%
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