Sayan Asked a Question
June 9, 2020 6:29 pmpts 30 pts
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  • Ruby negi
    this approach is same as the secular equilibrium method...
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  • Ruby negi
    for any doubt u can ask .
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  • Ruby negi
    hope u will get the solution...
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  • Ruby negi thankyou
    note Na/Nb is given in the question i.e R so option b is correct...
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  • Ruby negi thankyou
    I used this formula... feel free to ask doubts..
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  • Ruby negi Best Answer
    here is the solution dear..
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    Sayan
    thank you madam 😊