Объяснение:
w=Ar/Mr
Ar(Na)=23
Ar(C)=12
Ar(O)=16
Mr=23*2+12+16*3=46+12+48=106
w(Na)=46/106=0,434*100%=43,4%
w(C)=12/106=0,113*100%=11,3%
w(O)=48/106=0,453*100%=45,3%
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Объяснение:
w=Ar/Mr
Ar(Na)=23
Ar(C)=12
Ar(O)=16
Mr=23*2+12+16*3=46+12+48=106
w(Na)=46/106=0,434*100%=43,4%
w(C)=12/106=0,113*100%=11,3%
w(O)=48/106=0,453*100%=45,3%