gabrielperez184108 gabrielperez184108

04-06-2021
Chemistry

contestada

A sample of a certain isotope has an initial activity of 40,000 cpm. After 24.8 days, the activity is 2500 cpm. What is the half life of the isotope?

Respuesta :

agbliyah agbliyah

04-06-2021

Answer:

6.2 days

Explanation:

initial activity = 40,000 cpm

one half-life = 20,000 cpm

two half-lives = 10,000 cpm

three half-lives= 5,000 cpm

four half-lives = 2500 cpm

24.8 days/4 half-lives = 6.2 days/ half-life

Answer Link

Otras preguntas

The population P of a culture of bacteria is described by the equation P left parenthesis t right parenthesis equals 1200 e to the power of 0.052 t end exponent

Which type of data purging standard requires seven full passes or rewrites with bit-level erasure software?

we are asking everyone to focus on reducing their average transaction time by 10%. the average transaction time for this location is 6 minutes and 52 seconds so

The following statement is false. Rewrite the statement to make it true. All geometric series converge.

What is the approximate value for the thermic effect of a 2500-kcalorie diet??

can someone give me the answer to this

The four-sided geometric figure pictured is called a parallelogram. One feature of parallelograms is that opposite sides have equal lengths. The dotted line

A small sphere with a charge of − 0.60 μc is placed in a uniform electric field of magnitude 1.2 × 106 n/c pointing to the west. what is the magnitude and direc

Complete the statement using always, sometimes, or never. A rectangle is ________ a0 a rhombus.

mi abuela me pide que le llevo pan. incorrecto o correcto