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helens02
@helens02
August 2022
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Определить массовые доли у химических элементах :
NaNO₃
FeCl₃
Pb(NO₃)₂
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Answers & Comments
krioira
Mr(NaNO3)=23+14+3*16=85
W(Na)=23/85=0.27=27%
W(N)=14/85=0.16=16%
W(O3)=48/85=0.57=57%
Mr(FeCl3)=56+3*35.5=162.5
W(Fe)=56/162.5=0.35=35%
W(Cl)=106.5/162.5=0.65=65%
Mr(Pb(NO3)2)=207+2*14+6*16=331
W(Pb)=207/331=0.63=63%
W(N)=28/331=0.08=8%
W(O)=96/331=0.29=29%
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Answers & Comments
W(Na)=23/85=0.27=27%
W(N)=14/85=0.16=16%
W(O3)=48/85=0.57=57%
Mr(FeCl3)=56+3*35.5=162.5
W(Fe)=56/162.5=0.35=35%
W(Cl)=106.5/162.5=0.65=65%
Mr(Pb(NO3)2)=207+2*14+6*16=331
W(Pb)=207/331=0.63=63%
W(N)=28/331=0.08=8%
W(O)=96/331=0.29=29%