Предмет: Химия, автор: mashuko200

Обчисли масові частки хімічних елементів у плюмбум хлор два

Ответы

Автор ответа: 2nata0379

Ответ:

Объяснение:

Mr(PbCl2)=Ar(Pb)+2Ar(Cl)=207+2*35.5=278 г/моль

Mr(PbCl2) = Ar(Pb)+2•Ar(Cl) = 207 + 2•35,5 = 278

w(Pb)= Ar(Pb)/Mr(PbCl2) = 207 / 278 = 0,745 або 74,5%

w(Cl)= 1 - w(Pb) = 1 - 0,745 =0,255 або 25,5%

Відповідь: w(Pb)=0,745 або 74,5%; w(Cl)=0,255 або 25,5%.

2nata0379: w(Pb)= Ar(Pb)/Mr(PbCl2) = 207 / 278 = 0,745 або 74,5%
w(Cl)= 1 - w(Pb) = 1 - 0,745 =0,255 або 25,5%
Відповідь: w(Pb)=0,745 або 74,5%; w(Cl)=0,255 або 25,5%.

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