science
posted by duane .
A halflife of mercury195 is 31 hours. If you start with a sample of 5.00g of pure mercury195, how much of it will still be present after 93 hours?

three half lives?
what is 5*1/2*1/2*1/2 ? 
0.625
posted by duane .
A halflife of mercury195 is 31 hours. If you start with a sample of 5.00g of pure mercury195, how much of it will still be present after 93 hours?
three half lives?
what is 5*1/2*1/2*1/2 ?
0.625