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QJEEM02Chc5de: JEE Main 2002 Chemistry - Class 12 JEEM02Chc5de Solution: If half-life of a substance is 5 yrs, then the total amount of…

If half-life of a substance is 5 yrs, then the total amount of substance left after 15 years, when initial amount is 64 grams is

Step-by-Step Verified Solution

{t_{1/2}} = 5\,\,

years,

T=15

years hence -

total number of half life periods

= {{15} \over 3} = 3.

\therefore

Amount left

= {{64} \over {{{\left( 2 \right)}^3}}} = 8g