1.

Forthe firstorderreactionwithhalf lifeis 150seconds ,thetimefortheconcentration of thereactant tofallfromm/ 10tom/100willbeapproximately

Answer»

600 s
900s
500s
1500s

Solution :`(M )/(10)OVERSET(t_(1//2))to (M )/(20)overset(t_(1//2))to(M )/(40 )overset(t_(1//2))to(M )/(80 )overset(t_(1//2)to(M)/(180)`
` thereforeT=~3xxt_(1//2)=~450 "to"600s`


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