Answer to Question #84149 in General Chemistry for Alma Guillen

Question

what is the original amount of Po if 25.0 grams after 5 half lives?

Answer 1

The radiactive half-life gives a pattern of reduction to half in any successive half-life period.

A=A2^-t/T

T-is half-life period

As t=5T then

A=A2^-5T/T

25=A2^-5

25=A/32

A= 32*25

A=800

Answer: 800 g