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Консультация № 195151
06.04.2019, 12:47
0.00 руб.
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1
Здравствуйте! У меня возникли сложности с таким вопросом:
514 Найти массу радона, активность которого 3,71010 Бк.
[6,5*10^9 кг]
514 Найти массу радона, активность которого 3,71010 Бк.
[6,5*10^9 кг]
Обсуждение
08.04.2019, 11:42
общий
это ответ
Здравствуйте, kuznarskaavalentina!
Дано:
A=3,7*1010 Бк
М=0,222 кг/моль
Т=3,82 сут. = 3,3*105 с
(период полураспада Т берем из справочников, молярную массу М - из таблицы Менделеева)
Найти: m
Решение:
Активность нуклида
A=[$955$]*N (1)
где [$955$] = ln2/T - постоянная распада (2)
N = (m/M)*NA - количество атомов вещества (3)
NA = 6*1023 1/моль - число Авогадро
Подставим (2) и (3) в (1) и выразим массу
m=(A*T*M)/(NA*ln2)
После подстановки значений получим
m=6,5*10-9 кг = 6,5 мкг
Удачи
Дано:
A=3,7*1010 Бк
М=0,222 кг/моль
Т=3,82 сут. = 3,3*105 с
(период полураспада Т берем из справочников, молярную массу М - из таблицы Менделеева)
Найти: m
Решение:
Активность нуклида
A=[$955$]*N (1)
где [$955$] = ln2/T - постоянная распада (2)
N = (m/M)*NA - количество атомов вещества (3)
NA = 6*1023 1/моль - число Авогадро
Подставим (2) и (3) в (1) и выразим массу
m=(A*T*M)/(NA*ln2)
После подстановки значений получим
m=6,5*10-9 кг = 6,5 мкг
Удачи
5
Об авторе:
С уважением
shvetski
С уважением
shvetski
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