A sample of 100 millicurie of krypton gas consists of a mixture of the active isotope `.^(85)Kr` & the stable isotope `.^(84)Kr`. If the volume of the
A sample of 100 millicurie of krypton gas consists of a mixture of the active isotope `.^(85)Kr` & the stable isotope `.^(84)Kr`. If the volume of the mixtures `10 cm^(3)` at STP & half-life of `.^(85)Kr` is 10 years. Calculate the % by weight of `.^(85)Kr` present in the mixture.
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