Question

( 2 m a l rightarrow 0+0 . quad begin{array}{l}=100.8 mathrm{L} m 101 mathrm{LRm}end{array} )
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After 20 days imol ( 2^{mathrm{A}} mathrm{X} ) decay, Imolremain Agoin Afkn 20 day 0.5 11 " Total decay = 1 'smol Imol give 3 mole the So 1.5 mol gives ( 3 x cdot 15=4.5 ) mol the

# 5. An element AX, which is radioactive and has half life ts=20 days. The daughter nuclei formed after decay of X is Y. Calculate the volume of He collected at S.T.P after 40 days if 2 mole of X is placed in a sealed tube

Solution