Posted by Joshua on .
Suppose a laboratory has a 38 g sample of polonium210. The halflife of polonium210 is about 138 days. How many halflives of polonium210 occur in 1104 days? How much polonium is in the sample 1104 days later?

Science math 
Steve,
1104/138 = 8 halflives
after 8 halflives, 1/256 remains, or 0.148g 
Science math 
drwls,
How many halflives of polonium210 occur in 1104 days? 1104/138 = 8.0 halflives
How much polonium is in the sample 1104 days later? 38 g * (1/2)^8 = 0.148 g 
Science math 
Joshua,
Thank you both very much.

Science math 
Joseph,
8; 2,622 g

Science math 
abbie,
8; 0.11

Science math 
christina,
8';0.148