rachaell rachaell

12-03-2017
Chemistry

contestada

If you started with 1000 units of a radioactive element that has a half-life of 2,500 years, how many half-lives will the material have gone through in 7500 years? (Show work and explain answer).

Respuesta :

blackvision180 blackvision180

12-03-2017

well 1000×3=7500 so it would of gone through 3 half-lives

Answer Link

11Tomfoolery11 11Tomfoolery11

12-03-2017

either 1 because half the atoms can only decay once or 3 divide 7500 years by the amount of time it takes to reach a half life

Answer Link

Otras preguntas

what is the number of x

a class consist of 14 girls and 16 boys. the mean weight of the girls is55kg while the mean weight of the boys is64kg.what is the mean weight for the whole cla

What does 6x − 9 = 45 equal?

A comet's tail results from the increased speed that a comet attains as it nears the Sun, leaving some particles behind because of the acceleration of the main

According to the timeline, what were two significant events that occurred in September, 1862? (Please provide you answer in chronological order).

Let f(x) = x2 − 8x + 5. Find f(−1)

The Federalists believed that the French Revolution was a chaotic and dangerous war. an important fight for democracy. a valuable battle with Britain.

Which of the following statements is true about a "Works Cited" page? It includes a paragraph of text explaining why you used each resource using signal phrase

7) In which state would you have found the beginning of the Chisholm Trail? A) Texas B) Arizona C) California D) New Mexico

2. Suppose that you have 2 buyers and one item for sale. The first buyer values your product at $10, and the second buyer values your product at $6. You estimat