chris1219 chris1219

10-12-2018
Chemistry

contestada

what is the half life isotope if after 21 days you have 31.25 g remaining from a 250.0 g starting sample size?

Respuesta :

supersiren25 supersiren25

10-12-2018

250 --> 125 --> 62.5 --> 31.25

each arrow equals one half life, so 3 half lives

14 days/ 3 half lives =

4.67 days = half life

Answer Link

Otras preguntas

At the end of the study, the sociologist had a sample of 500 expectant parents. He estimates that there are 6 million expectant parents in the United States. Gi

Air that enters the pleural space during inspiration but is unable to exit during expiration creates a condition called

During adolescence, early dating relationships tend to be more _____ when compared to dating in later adolescence.

Write a sentence or two explaining what the colonists may have thought about the Proclamation of 1763.

D. Tran and D. M. Blei. Implicit causal models for genome-wide association studies. In International Conference on Learning Representations, 2018.

For political speeches, it is suggested that you tell the audience what the main message of the speech is ____________________.

A general characteristic of connective tissue is that it covers the outside of organs. is commonly found lining body cavities. contracts. has no blood supply to

At what speed is a particle's momentum three times more than its newtonian value?

If jkl is similar to rst, the angles of jkl must be congruent to the corresponding angles of rst. a. true b. false

The reactant and product of the reaction you will perform today both contain carbon-carbon double bonds. What is the correct 13C NMR chemical shift range for a