Question 21 of 25 View Policies Current Attempt in Progress < E- eTextbook and Media Save for Later & The isotope 1311 h
Posted: Sun Jul 10, 2022 4:16 pm
- Question 21 Of 25 View Policies Current Attempt In Progress E Etextbook And Media Save For Later The Isotope 1311 H 1 (15.83 KiB) Viewed 32 times
- Question 21 Of 25 View Policies Current Attempt In Progress E Etextbook And Media Save For Later The Isotope 1311 H 2 (13.63 KiB) Viewed 32 times
- Question 21 Of 25 View Policies Current Attempt In Progress E Etextbook And Media Save For Later The Isotope 1311 H 3 (15.87 KiB) Viewed 32 times
- Question 21 Of 25 View Policies Current Attempt In Progress E Etextbook And Media Save For Later The Isotope 1311 H 4 (12.26 KiB) Viewed 32 times
- Question 21 Of 25 View Policies Current Attempt In Progress E Etextbook And Media Save For Later The Isotope 1311 H 5 (12.86 KiB) Viewed 32 times
Current Attempt in Progress Extremely old rock samples can be dated using the ratio of Sr to Rb, because tua for Rb is 4.9 x 1011 years. What is the approximate age of a meteorite that has a 7Sr:07Rb mass ratio of 0.0066? eTextbook and Media Save for Later * 10 i Attempts: 0 of 3 used Submit Answer
View Policies Current Attempt in Progress In the hydrolysis of an ester, one oxygen atom in the products comes from the ester and the other comes from a water molecule: RCO-O-R+H₂O-RCO-OH-HO-R Describe experiments that would determine if the oxygen atom in the alcohol HO-R' comes from water or from the ester. Isolate the two products and is the one whose added oxygen atom comes from water. Run the hydrolysis analyze them. Whichever product shows eTextbook and Media Save for Later that is enriched with a radioactive isotope of Attempts: 0 of 3 used Submit Answer
View Policies Current Attempt in Progress A 250 mg sample of CO₂ collected from a small piece of wood at an archaeological site gave 1020 counts over a 24 h period. In the same counting apparatus, 1.00 g of CO₂ from freshly cut wood gave 18 400 counts in 20 h. What age does this give for the site? eTextbook and Media Save for Later yr Attempts: 0 of 3 used Submit Answer
Question 25 of 25 View Policies Current Attempt in Progress lodine-123, 11/2" 13.2 h, is used in medical imaging of the thyroid gland. If 0.8 mg of this isotope is injected into a patient's bloodstream and 45% of it binds to the thyroid gland, how long will it take for the amount of iodine in the thyroid gland to fail to less than 0.1 ug? eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer