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

A successful biologist’s main interest area would be
He picks 1 2/5 kg less strawberries in the morning than in the afternoon
Paco esta_____ A. durmiendo B. dormiendo C. durmando D. duermiendo
what are the measures of the angles 2:4:9
Why does the foundation of a very large building often go all the way down to the bedrock?
The most common mineral group in Earth's crust is the ____. A. Oxides B. Carbonates C. Sulfides D. Silicates
During unusually cold weather, the temperature is Miami beach was 10 C. This was 12 degrees more than in Tallahassee. What is the temperature in Tallahassee?
Mi habitación ideal es grande o está grande
what is 3,729÷5 equal
a truck uses an (external/internal) combustion engine