Strontium-90 is a dangerous substance that is released in nuclear weapon fallout. However, under controlled conditions, it can be used to treat bone cancer, and it can also be used as a radioactive tracer in medical and agricultural studies. If a scientist has 10 g of
strontium-90, how many grams will remain after 3 half-lives?
OA. 11.25 grams
OB. 10 grams
OC. 5 grams
OD 1.25 grams

look at the !

pleaze mark brainliest!

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

i believe that it is a exoplanet

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.