destinysmithds7040 destinysmithds7040
  • 17-01-2022
  • Biology
contestada

4 PTS

What percent of uranium-235 remains after 1420 million years?

A)

12.5%

B)

25%

C)

40%

D

75%

Respuesta :

chibabykalu16
chibabykalu16 chibabykalu16
  • 19-01-2022

Answer:

B) 25% but to be exact 24.7%

Explanation:

The halflife of 235U is 704 million years. 1420 million years is approximately two halflives, so about 24.7% would be remaining.

Answer Link

Otras preguntas

solve the system of equations 3y 2z = 12 and y – z = 9. a. y = 24, z = 15 b. y = 6, z = 15 c. y = 6, z = –3 d. y = –6, z = 15
how equality between the sexes shaped human society
whats the gcf of n^3t^2 and nt^4
when might an organism rely on fermentation to produce the energy it needs?
Catherine has $54. She plans to spend more than $20 of the money for a painting canvas. The rest will go toward paints. Each tube of paint costs $8.50. Assume t
what is a collective subject
what is the exact value of cos(–60º)?
how many axes of symmetry has a rhombus
labor unions typically negotiate wages, employmen t benefits, and
what step must come first in the scientific method