Сколько грамм Al содержится в 100 граммах солей: 1)AlBr3 2)Al(NO3)3 3)Al2(SO4)3 4)AlPO4 5)Al2S3

1) m(Al)=100g*W(Al) W(Al)=[latex] \frac{Ar(Al)}{Mr( AlBr_{3}) } [/latex] = [latex] \frac{27}{267} [/latex] = 0.101 m(Al)=100g*0.101=10.1g 2) m(Al)=100g*W(Al) W(Al)=[latex] \frac{Al}{Mr(Al(NO_{3}) _{3}) } [/latex]=[latex] \frac{27}{213} [/latex]≈0.127 m(Al)=100g*0.127=12.7g 3) m(Al)=100g*W(Al) W(Al)=Mr(Al)/Mr(Al2(SO4)3)=54/342≈0.158 m(Al)=100g*0.158=15.8g 4) m(Al)=100g*W(Al) W(Al)=Ar(Al)/Mr(AlPO4)=27/122≈0.221 m(Al)=100g*0.221=22.1g 5)m(Al)=100g*W(Al) W(Al)=Mr(Al)/Mr(Al2S3)=54/150=0.36 m(Al)=100g*0.36=36g.