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The half life of ""_(92)^(238)U undergoing alpha decay is 4.5 xx 10^9 years what is the activity of 1g. Sample of ""_(92)^(238)U. |
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Answer» Solution :`T_(1//2)=4.5 xx 10^9 y` `=4.5 xx10^9xx3.16 xx10^7s` `=1.42xx10^(17)s` `1g "of" ""_(92)^(238)U "contains" =1/(238)xx6.025 xx10^(23)"ATOM"` `=25.3 xx10^(20) "atom"` `THEREFORE "decay RATE " =R =LAMBDA N=(0.693)/TxxN` `=(0.693 xx25.3 xx10^(20))/(1.42xx10^(17))s^(-1)` `=1.23 xx 10^4 `bq. |
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