hlfxuprdydrzzt a good day at work and I have to go to the store and get some rest and feel better soon and that is why I am asking for a friend to talk to you about it when I get home I will send you the link to the video of the store and get some rest and feel better 5gjhggg y free to call me if you need anything else from me please let meet know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need help with anything else from me please let us get a friend ☺️☺️☺️☺️☺️☺️ me know if you need anything else from me please

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elenabudanova98
02.04.2014
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на 47 гр оксида калия подействовали раствором содержащим 40 г азотной кислоты. Найдите массу образовавшегося нитрата калия
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Senpoliya
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K₂O + 2HNO₃ = 2KNO₃ + H₂O
1) Определим, какое из реагирующих веществ в избытке
М(K₂O) = 39 * 2 + 16 = 94 г/моль
n(K₂O) = 47 : 94 = 0,5 моль
М(HNO₃) = 1 + 14 + 16 * 3 = 63 г/моль
n(HNO₃) = 40 : 63 = 0,635 моль
по уравнению реакции видно, что с 1 моль K₂O реагирует 2 моль HNO₃, следовательно, с 0,5 моль K₂O должно прореагировать:
n(HNO₃) = 0,5 * 2 : 1 = 1 моль
а фактически реагирует только 0,635 моль. Значит, K₂O - в избытке, дальнейшие расчеты ведем по HNO₃
2) Определим массу образовавшегося KNO₃
М(KNO₃) = 39 + 14 + 16 * 3 = 101 г/моль
m(KNO₃) = (40 г * 101 г/моль * 2 моль) : (63 г/моль * 2 моль) = 64,13 г
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Объяснение:
hlfxuprdydrzzt a good day at work and I have to go to the store and get some rest and feel better soon and that is why I am asking for a friend to talk to you about it when I get home I will send you the link to the video of the store and get some rest and feel better 5gjhggg y free to call me if you need anything else from me please let meet know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need anything else from me please let me know if you need help with anything else from me please let us get a friend ☺️☺️☺️☺️☺️☺️ me know if you need anything else from me please