72 g/mol---100%
x g/mol--77,8%
x=56 g/mol
56 g/mol:56 g/mol=1 atom Fe
72 g/mol-56 g/mol=m tlenu
m tlenu=16 g/mol
16 g/mol:16 g/mol=1 atom O
Wzór: FeO
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72 g/mol---100%
x g/mol--77,8%
x=56 g/mol
56 g/mol:56 g/mol=1 atom Fe
72 g/mol-56 g/mol=m tlenu
m tlenu=16 g/mol
16 g/mol:16 g/mol=1 atom O
Wzór: FeO