Предмет: Химия, автор: margaritapucovamargo

даю 50 балов!!!! СРОЧНО ПОМОГИТЕ

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Ответы

Автор ответа: sashablackoff13

1

Ответ:

Объяснение:

1) m(Na2SO4*10H2O)=x

2) m(Na2SO4)=142x/322=0.441x

3) w(Na2SO4)=m(Na2SO4)/m(общ)=0.441x/(800+x)=0.1

0.441x=80+0.1x

0.341x=80 --------------------x=234.6

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