+0  
 
0
65
1
avatar

The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced to a mass of 2 mg.

What was the initial mass (in mg) of the sample?

What is the mass 5 weeks after the start?

 Mar 9, 2021
 #1
avatar+31195 
+1

12 days is   3 half lives

2 ---------  4 ---------   8  --------  16  mg initially

 

5 weeks =  5 x 7 = 35 days             35 days / 4days/half life = 8.75 half lifes

16 mg (1/2)8.75   = .03716 mg

 Mar 9, 2021

90 Online Users

avatar
avatar
avatar
avatar
avatar
avatar
avatar