Предмет: Химия, автор: nino2

к раствору сульфида натрия массой 156г с массовой долей 5% добавили избыток раствора серной кислоты. вычислите объем (н.у) выделевшегося газа

Ответы

Автор ответа: Диборан

Na2S+H2SO4=Na2SO4+H2S m(чистого Na2S)=156*5%=7,8 г n(Na2S)=m/M=7,8/78=0,1 моль V(H2S)=n*Vm=0,1*22,4=2,24 литра

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AGENT. Glad to see you safe and sound and in the same good mood, as usual. It seems to me that you are going to start discharging today, eh? How long will it take you to lower and fix the ramp?
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TRANSPORTATION OF CARGOES BY RO-RO VESSELS

As the term itself implies, the name “Ro-Ro” is an abbreviation of the Roll on, Roll off. These words signify the way of loading cargoes between quay and ship by means of rolled vehicles. These vehicles may be wheeled platforms or “trailers” as they are usually called, towed by tractors or lorries.
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Words and Word Combinations

term термин
to imply подразумевать, намекать
to signify означать, иметь значение
vehicle перевозочное средство, повозка
to roll катить
to wheel катить, вести (на колесах)
reloading перегрузка
in spite of несмотря на
investment капиталовложение
ramp рампа, аппарель
to accelerate ускорять
simultaneously одновременно
level уровень
three-decker трехпалубное судно
power plant силовая установка
e.h.p. (effective horse power) эффективная л.с.
sound здоровый, крепкий
mood настроение, расположение духа
brilliant блестящий
licensed имеющий права (водителя)
axis ось
to surmise предполагать, высказывать догадку
approximation приблизительная оценка, цифра
to stand зд. выдержать
by far намного

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it stands to reason зд. разумно
to my mind по моему мнению
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