Chemistry, asked by Purbahna, 1 year ago

Please solve step by step

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Answered by messi10leo

1

this question we have to solve like this:

20*90/100=18

18is the correct answer

Answered by pramobtiwari

4

Half life period=20min

20×90/100===18

thanks....❤️❤️✌️✌️

messi10leo: hi

pramobtiwari: hiii

messi10leo: how u

pramobtiwari: fine

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