kingdesto9789 kingdesto9789

02-08-2022
Chemistry

contestada

How many half-lives have passed in a sample that originally contained 5000 parent isotopes but now has only 625?

Respuesta :

jsimpson11000 jsimpson11000

02-08-2022

Answer:

3 half lives

Explanation:

5000 * (1/2)^n = 625 where n = number of half lives

log ( 625/5000) / log(1/2) = n = 3

5000 2500 1250 625

Answer Link

Otras preguntas

f(x) = 2x - 1 g(x) = - 3x + 2

Using these balanced reactions, 2C+O2=2Co Fe2O3+3Co=2Fe+3Co2 how many moles of O2 are required for the production of 3.19 kg of Fe? A) 42.8 moles B) 19.0 moles

4. T/F Pilgrims settled in Virginia in 1620 and were also called Puritans.

If the Expression 5c+15 is equal to 21, determine the value for the Expression 5c+18.

Convert 250 m to km .......

1. ____________ is the tea? It's five thousand rupiahsa. how manyb. how muchc where2. _________ book is on the table? It's mine. a. whob. whosec. what3. _______

Which of these represent the correct ratio of boys to girls as a rate? Select all that apply. A. 12 girls for every boy B. 14 to 12 C. 14 boys for every 12 girl

Is 3.14 greater than -5?

Solve the equation for the individual variable. P= W/t, for t A.) t = P/W B.) t = P - W C.) t = W/P D.) t = PW

3. EXPLAINING EFFECTS Were the effects of the War of 1812 mostly positive or mostly negative for the United States?