Предмет: Химия, автор: strond

найти массовую долю кислорода в Mg(NO3)2*6H2O

Ответы

Автор ответа: dani2015

W = Ar(O) * a/Mr (вещества)
а - число атомов кислорода в вещстве (индексы)

W(O) = 16*2/34 = 0.94
W(O) = 16/217 = 0.073
W(O) = 16*4/158 = 0.4
W(O) = 16*3/122.5 = 0.39

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