A sealed source contains equal masses of ( , ) and ( , )

PHYSICS · Subjective · CBSE · Physics · Nuclei · Nuclei

Problem

A sealed source contains equal masses of

^{32}\text{P}

(

T_{1/2}=14.3\,\text{d}

M=32\,\text{g mol}^{-1}

) and

^{35}\text{S}

(

T_{1/2}=87.4\,\text{d}

M=35\,\text{g mol}^{-1}

). After how many days will the activity due to

^{32}\text{P}

alone become equal to the activity due to

^{35}\text{S}

alone? Give your answer to the nearest whole day. (Use

N_A = 6.02\times10^{23}\,\text{mol}^{-1}

and

1\,\text{d}=86400\,\text{s}