Part A
The barium isotope 131 Ba has a h

Question

Part A
The barium isotope 131 Ba has a half-life of 12
days. A 270 ug sample of 131 Ba is prepared.
Part B
Part C
What is the mass of 131 Ba after 100 days?
Express your answer to two significant figures and include the appropriate units.
01
li
HA
?
m =
Value
Units

Kunduz · Accepted Answer

131
Giveni half life of Ba (Tag) = 12 days'
Using radioactive equation (decay)!--
( ,
N= No podt
e
Here No -
Number of
Number of
sample is atom
sample at time
t.
& de
decay constant
At halt lite (Tim) -
N No
2 2
No
2
Noe die
dł
ZINT
& Ti
=
2
HE
In 2
Tv
= 212
0.058 day-
131
2
Now, after loo days number of ba's
atim will be
-0.058 x 1ool
NS No e
-5.8
I
N
Noe
8
]
11

Part A The barium isotope 131 Ba has a half-life of 12 days. A 270 ug sample of 131 Ba is prepared. Part B Part C What is the ma