deairra4 deairra4
  • 15-04-2021
  • Advanced Placement (AP)
contestada

You have 400 mg of a radioisotope with a half-life of 5 minutes. How much will be left after 30 minutes?

A 6.25mg

B 12.5 mg

C 100 mg

D 50 mg

Respuesta :

dvnl dvnl
  • 15-04-2021
If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.

Thus, A would be the correct answer choice here.
Answer Link

Otras preguntas

Which numbers belong to the range of the revolution {(4,-1),(-7,2),(1,2),(2,1)} Choose all the that are correct A 2 B 1 C -1 D -7 Which numbers belong to the
What is the past participle of "buy" ????¿¿¿¿???
what trade-offs occurs when you are gathering information?
what is two sixths the same as what?
Why is Erie Canal important to the northeast region
i need the step by step answer for 1/3(9x+3)=3x+1
Write 0.28 as a fraction in simplest form.
if a train is slowing down it is accelerating
Which is a correct statement about gametogenesis? In gametogenesis, germinal cells multiply by mitosis and mature gametes are formed by meiosis. In gametogenesi
I need help finding the radius to this question: Circle o is represented by the equation (x+2)^2 + (y-5)^2=48.The coordinates of the center and the length of th