Question

you have 576 grams of radioactive kind of mercury. if its half-life is 64 hours,how much will be left after 256 hours?

Answer 1

36 grams

Explanation:

We have 576 grams of the mercury like substance.

Half of it's lifespan is 64 hours.

The time is 256 hours.

256 ÷ 64 = 4

Material will be left:

576 x
`(1/2^(4) )`

576 x 1/16 = 36 grams

Answer 2

• 36 grams

Explanation:

• Amount of radioactive material = 576 grams
• Half-life = 64 hours
• Time = 256 hours

Cycles of reduction:

• 256/64 = 4

Material will be left:

• 576*(1/2)^4 =
• 576*1/16 =
• 36 grams