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?

25 g

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

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93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.