Question

How much of a 1.0 g polonium-214 sample remains after 818 microseconds? The half life of polonium -214 is 163.7 microseconds

Answer 1

0.0320g

Explanation:

solving for M, and we are given Mo=1.00g, t=818 microseconds, t1/2=163.7 microseconds.

n=t/t1/2=818/163.7=4.97

M=Mo(1/2)n=1.00(1/2)4.97=0.0320g

Answer 2

Answer: 0.3125g

Step-by-step explanation: 1.0 * 1/2= 0.5

0.5* 1/2= 0.25

0.25* 1/2= 0.125

0.125* 1/2= 0.625

0.625* 1/2= 0.3125g