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Консультация № 194659
10.02.2019, 15:01
0.00 руб.
1
1
1
Здравствуйте! Прошу помощи в следующем вопросе:
Задача 3. Масса радиоактивного препарата изотопа A(Z)X равна m. Используя данные таблицы 3, выполните следующее:
1. Найдите значение начальной активности препарата и его удельную
активность.
2. Рассчитайте промежуток времени, в течение которого активность препарата
уменьшится в k раз?
Задача 3. Масса радиоактивного препарата изотопа A(Z)X равна m. Используя данные таблицы 3, выполните следующее:
1. Найдите значение начальной активности препарата и его удельную
активность.
2. Рассчитайте промежуток времени, в течение которого активность препарата
уменьшится в k раз?
Прикрепленные файлы:
Обсуждение
13.02.2019, 09:42
общий
это ответ
Здравствуйте, dar777!
Начальная активность
изотопа (в таблице обозначена через 
) вычисляется по формуле
где
-- постоянная радиоактивного распада, 
суток
(с) -- период полураспада атомов изотопа циркония-95,
-- количество атомов изотопа в начальный момент.
Молярная масса циркония-95 составляет
г, число Авогадро 
атомов/моль; поэтому, в соответствии с формулой 
(Бк).
Активность изотопа уменьшается со временем по закону
поэтому, если
то, в соответствии с формулой 
(с)
суток.
Начальная активность
изотопа (в таблице обозначена через ) вычисляется по формулегде
-- постоянная радиоактивного распада, суток (с) -- период полураспада атомов изотопа циркония-95, -- количество атомов изотопа в начальный момент.Молярная масса циркония-95 составляет
г, число Авогадро атомов/моль; поэтому, в соответствии с формулой (Бк).Активность изотопа уменьшается со временем по закону
поэтому, если
то, в соответствии с формулой (с) суток.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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