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140 г раствора насыщенного при 60 град.С, охладили до 20 град.С . Найти массу (г) осадка. (S(20 град.С)соль=20г, S(60 град.С)соль=50 г)
1)30 2)27 3)28 4)29-
Предмет:
Химия -
Автор:
chandlerzewa - 5 лет назад
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Ответы 1
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Автор:
cookie49 - 5 лет назад
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Пожалуйста, помогите, 4 класс.
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Выберите правильный вариант в тестах:
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а. have you read, you read
б. have you been reading, have you been reading
в. have you read, have you read
г. have you been reading, have you read
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а. are going
б. go
в. have been going
г. were going
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б. was always losing
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а. got
б. would be getting
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а. had read, made, drove
б. have read, made, drove
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а. were translated, were calculated
б. had been translated, are calculated
в. are translated, are calculated
г. have been translated, are calculated
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б. had had, cut
в. has had, cut
г. is having, cut
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а. can not
б. should
в. could
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