# Chemistry-help please!

posted by
**Charleze** on
.

The half-life of Xe-133 is 126 hours. Starting with 250. mg, after 500 hours around how many mg remain?

A. 63

B. 16

C. 32

D. 125

posted by
**Charleze** on
.

The half-life of Xe-133 is 126 hours. Starting with 250. mg, after 500 hours around how many mg remain?

A. 63

B. 16

C. 32

D. 125