irelannnf
irelannnf irelannnf
  • 18-01-2017
  • Physics
contestada

The half-life of a certain isotope is 15 minutes. How much of a 400 g sample will remain after 90 minutes?12.5 g6.25 g26.7 g66.7 g25 g

Respuesta :

lunabischoff lunabischoff
  • 18-01-2017

There is a total of 6 half lives that need to take place.


ONE HALF LIFE = 200

TWO HALF LIFES = 100

THREE HALF LIFES  = 50

FOUR HALF LIFES = 25

FIVE HALF LIFES = 12.5

SIX HALF LIFES = 6.25


The answer is 6.25g



Answer Link

Otras preguntas

which compound contains both ionic and covalent bonds? a.)CaCo3 b.)PCl3 c.)MgF2 d.)CH2O
How many acres does the new york botanical garden cover?
George is trying to make some decisions about his business and has come up with P = (x - 100)(x + 20), where P represents his profit margin and x represents the
What argument did Andrew Jackson use to persuade people that the Indian Removal Act was a good decision?
The sum of the _____ energy of a substance is the sum of the kinetic energies and potential energies of all of the molecules in the substance.
What role does the ovary play in the menstrual cycle?
Why did early scientists call interphase the resting stage?
In the 1930's who nominated Adolf Hitler as chancellor?
How did the erie canal change the U.S.
What was the most significant effect that world war 1 had on russia?