Вопрос 1 Какое значение имеет число электронов n в следующем электродном процессе
2HNO2 + 6H+ + ne = N2 + 4H2O

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Вопрос №2
Для гальванического элемента Fe| Fe+2 (1моль/л) || Ag+(0,1моль/л) |Ag указать полярность электродов и направление движения электронов во внешней цепи. Рассчитать ЭДС.

1,24 В, Fe(+); Ag(-); от Fe к Ag;
1,18 В, Fe(-); Ag(+); от Fe к Ag;
1,18 В, Fe(-); Ag(+); от Ag к Fe;
1,24 В, Fe(+); Ag(-); от Ag к Fe.

Вопрос №3
Скорость простой одностадийной реакции 3H2(г) + N2(г) = 2NH3(г) увеличении объема реактора в 2 раза …

уменьшается в 16 раз;
не изменяется;
увеличивается в 2 раза;
уменьшается в 4 раза.

Вопрос №4
Энтальпия образования FeO cоставляет -265 кДж/моль. Сколько тепла выделится, если образуется 144 г оксида железа?
132,5 кДж;
530 кДж;
677 кДж;
488 кДж.

Вопрос №5
Какой процесс протекает на катоде, если луженое (покрытое оловом) железо находится в кислой среде:

Sn2+ + 2e = Sn
Fe2+ + 2e = Fe
2Н+ + 2e = Н2
O2 + 2H2O + 4e = 4OH-

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Ответ:

nikemaxair55780

06.05.2022 12:39

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