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

mark didn't want to get up. but his robot dog, mr. shiny, was programmed to nip at his feet at exactly 7:00 every morning. mark sleepily walked down to the kitc

are the answers right, what the answer for the missing

Sally was asked to find two integers such that one is three less than 4 times the other and the sum of the two integers is 42. The integers must be _____. A. 14

A cactus can either have long needles (L) or short needles (l). A cactus grower crosses two cacti. The cross is shown in the Punnett square below. What is the p

the value of x + y is negative, and x is a positive interger. What must bw true about y? Explain

which character said the following lines after caesar's death? friends, romans, countrymen, lend me your ears; i come to bury caesar, not to praise him. the evi

the smallest group in linnaeus's system of classification is the

How does the medium of Interview with Marielle Tsukamoto affect the structure of the main ideas and supporting sentences? The structure of the response is less

which region was under the influence of both russia and england? a. persia b. china or d. the caucasus

how is protein different from a carbohydrate?