Agamberiecy Agamberiecy
  • 01-06-2017
  • Chemistry
contestada

Iodine-131 is a radioactive isotope with a half-life of 8 days. how many grams of a 64 g sample of iodine-131 will remain at the end of 24 days? select one:
a. 48 g
b. 8 g
c. 56 g
d. 32 g

Respuesta :

dec77cat dec77cat
  • 01-06-2017
T= 8 d
m₁=64 g
t=24 d

m₂-?

n=t/T
n=24/8=3

m₂=64/2ⁿ

m₂=64/2³=8 g

b. 8 g
Answer Link

Otras preguntas

How many more equal sides does an equilateral triangle have than a right isosceles triangle?
Which pair of ratios form a proportion? A. 5 : 11 and 6 : 12 B. 7 : 13 and 21 : 39 C. 8 : 14 and 24 : 30 D. 10 : 20 and 20 : 30 Please help me.
Help in chemistry !!!!!!!!!!!
3+x>10 solve the answer to this problem
What is a Phenomenon characterized by poorly planned development on the edges of cities and towns?
Definition of pascal's principle
The _____ supported the ratification of the Constitution. A. Anti-Federalists B. Federalists C. Proponents D. Loyalists
The purpose of nervous tissue is A. movement. B. support. C. protection. D. communication I cant find the answer in my book! help?
what is 0.8-0.5/5+0.2
The 1905 massacre of protestors outside the czar's palace in St. Petersburg, Russia, is known as _____.