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

how do you change the top and bottom margins of an entire document

Communist governments surrendered one-party control in 1989 and called for free elections in all of the nations of Eastern Europe, EXCEPT __________.

Answer them all/ not cheating just want to check them

What is the mass of a 735-N weight on Earth? A. 73.5 kg B. 75.0 kg C. 334.1 kg D. 725.2 kg

The direction of motion for a series of wave fronts is represented with a(n) _____. wavelength ray crest trough

Identify the complete adjective clause. This course deals with facts that everyone should know

What impact did railroads have on cities across the United States at the turn of the twentieth century?

What is the exact circumference of a circle with a radius of 17 millimeters? A. 17π millimeters B. 34π millimeters C. 68π millimeters D. 8.5π millimeters

which is a true statement about the open door policy

Why were there no cables for electricity in the early elevators