Disintegrations per Minute Time (h) 180 130 2.5 104 5.0 77 7.5 59 10.0 46 12.5 24 17.5

The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 × 10 years. Suppose nuclear chemical analysis shows that there is 0.727 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. db years Submit Assignment O 2020 McGraw-Hi Education. All Rights Reserved. Terms of Uhe I Pivacy I Accessibility 1113 PM 0 49 12/17/2020 O Type here to search FULL HD 1080 Ecer Del Pg Up Pause Home F11 F12 PrtSc F6 F7 F8 F9 F10 Sa Lk SysRq Break Ins F2 F3 F4 F5 Esc F1 63 z' Nu & Backspace @ # 7 8.

Hi, I need help with this step-by-step, please. Thank you.    Even more interesting is how the researchers determined the age of the sharks. Normally, youcould look at the decay of carbon-14 in the bone of an animal to determine its age. By comparingthe current amount of carbon-14 in the bone to the amount of carbon-14 that was in the boneinitially, you can determine how much time has passed (the age of the animal). This doesn’twork with Greenland sharks, though! Greenland sharks don’t have bones. They just havecartilage. Researchers determined, however, that the carbon-14 in certain proteins in the eye lensof the sharks could be dated because those proteins are set from the time that the shark is bornand are never replaced (most proteins in living organisms are constantly being broken down andreplaced, but not these proteins in the eye lens of the Greenland shark!).[Here’s the problem to solve and the information you need to solve it.] Let’s assume thatresearchers find a new Greenland…

A certain signal molecule S in brain tissue is degraded by two different biochemical pathways: when only Path 1 is active, the half-life of S is 9.0 s. When only Path 2 is active, the half-life of S is 67.7 s. Calculate the half-life of S when both pathways are active. Rounded your answer to 2 significant digits.

The half-life of the radioactive isotope 137Cs is 30.17 years. How long does one have to wait until exactly 3% of the initial amount of this isotope remains? O A. 200.4 years O B. 140.1 years O C. 152.6 years O D. 29.26 years O E. 170.3 years

The first-order decay of iron-59 has a half-life of 44,495 days. How many grams of iron-59 decompose after one month (assume it is in April) if the sample initially weighs 100.0 g?

The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 x 10 years. Suppose nuclear chemical analysis shows that there is 0.280 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits. |years

A certain drug has a half-life in the body of 7.5 h. What should the interval betwe 60.% of its initial concentration? Round your answer to 2 significant digits.

please answer all as they are part of 1 question but different questions,,.