Mr (P2O5)=w (P)=w (O)=________ формула AxBy w (A)=w (B)=

Mr (P2O5)=Ar (P)*2+Ar (O)*5=31*2+16*5=+62+80=142w% (P)=(Ar (P)*2/Mr (P2O5)*100%=(62/142)*100%=43,7%w% (O)=(Ar (O)*5/Mr (P2O5)*100%=(80/142)*100%=56,3% ответ: w% (P)=43,7%,w% (O)=56,3%AxByMr (AxBy)=Ar (A)*x+Ar (B)*yw% (A)=(Ar (A)*x/Mr (AxBy)*100%w% (B)=(Ar (B)*y/Mr (AxBy)*100%