ω=n×Ar/Mr×100%
а) Mr(CO₂)=Ar(C)+Ar(O)×2=12+16×2=44
ω(C)=12/44=0,27×100%=27%
ω(О)=2×16/44=0,72×100%=72%
б) Mr(CaS)=Ar(Ca)+Ar(S)=40+32=72
ω(Ca)=40/72=0,56×100%=56%
ω(S)=32/72=0,44×100%=44%
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ω=n×Ar/Mr×100%
а) Mr(CO₂)=Ar(C)+Ar(O)×2=12+16×2=44
ω(C)=12/44=0,27×100%=27%
ω(О)=2×16/44=0,72×100%=72%
б) Mr(CaS)=Ar(Ca)+Ar(S)=40+32=72
ω(Ca)=40/72=0,56×100%=56%
ω(S)=32/72=0,44×100%=44%