Предмет: Химия, автор: shihatovas

Хлоридна кислота взаємодіє з магнієм масою 8,4г.Зробіть необхідні обчислення та вкажіть кількість речовини хлоридної кислоти, взятої для реакції.​

Ответы

Автор ответа: Warlock1
4

Ответ:

Объяснение:

Mg+2HCl=MgCl2+H2

M(Mg)=24 г/моль  (примерно)

n(Mg)=m/M=8.4/24=0.35 моль

Из уравнения химической реакции:

n(Mg):n(HCl)=1:2

n(HCL)=2*n(Mg)=2*0.35=0.7 моль

shihatovas: спасибо большое
Warlock1: ой, там MgCl2, опечатка была, извиняюсь, поправил)
www8888: Извините, а откуда мы взяли 24г/моль ?
Warlock1: Молекулярная масса магния по таблице Менделеева
www8888: Спасибо )
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