Question

Vanadium-48 has a half life of 16 days. If a 800.0 gram sample is allowed to stand for 80.0 days how much vanadium-48 will remain?

Answer 1

25 g

Step-by-step explanation:

N/No = (1/2)^t/t1/2

N= amount of radioactive material at time t

No = amount of radioactive material initially present

t= time taken

t1/2 = half life of the radioactive material

Substituting values;

N/800 = (1/2)^80/16

N/800= (1/2)^5

N/800= 1/32

32N = 800

N= 800/32

N= 25 g