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1. Рассчитайте молярную массу эквивалента гидроксида алюминия и дихромата натрия.
2. Какую концентрацию выражает количество вещества, отнесенное к 1 кг растворителя? Запишите выражение.
3. Сколько граммов растворенного вещества содержит 300 мл 0,02М раствора сахарозы С12Н22О11?
4. Вычислите массовую долю азотной кислоты в 2н растворе (ρ = 1,066 г/мл).
5. Давление водяного пара при 20 0С составляет 2,333 кПа. Вычислите для той же температуры давление пара раствора, в 580 г которого содержится 30 г мочевины CO(NH2).-
Предмет:
Химия -
Автор:
nathalyrosario - 5 лет назад
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Ответы 4
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в чем ошибка?
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Автор:
samir6jta - 5 лет назад
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0
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не знаю сам,мне минусы за это задание поставили и все..
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Автор:
vaughnbean - 5 лет назад
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0
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я тебя предупреждала) что есть сомнения) надо было перепроверить
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Автор:
kid13 - 5 лет назад
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0
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ладно,что уж теперь)все равно спасибо,попробую сам сделать)
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Автор:
apollokbze - 5 лет назад
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0
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Предмет:
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Автор:
foxy78 - 5 лет назад
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