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

What's the percent of change for 30 to 90
Who proposed the idea of uniformitarianism first? A. Charles Lyell B. James Hutton C. Jean Baptiste Lamarck D. Charles Darwin
Which is the correct chronological sequence for these documents? 1. U.S. Constitution 2. Declaration of Independence 3. Bill of Rights 4. Articles of Confederat
What important piece of legislation was passed during Harding's administration? A. National Industrial Recovery Act B. Emergency Quota Act C. Patman Bill
450 is what percent of 600
*****PLEASE HELP QUESTION ATTACHED*****
What is 24x^2y^6-16x^6y^2+4xy^2 divided by 4xy^2?
solve the inequality [tex] \frac{x+1}{x-8} \leq 0 [/tex]
Mrs.krikbaum comes to the clinic because of excruciating pain in the left side of her face whenever she drinks cold fluids. What nerves is likely to be inflamed
integral of (8xe^8x)