Chemistry miscellaneousHard

Question

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

Options

A.16 grams
B.2 grams
C.32 grams
D.8 grams

Solution

After every 5 years amount is becoming half.
∴ 64g 32g 16g 8g

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