SO2Cl2 is 0.012 M, how many seconds will it take for the SO2Cl2 to reach 0.0020
ID: 943948 • Letter: S
Question
SO2Cl2 is 0.012 M, how many seconds will it take for the SO2Cl2 to reach 0.0020 M 91 A 500 mg sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 1.3 x 10 yr) and 2.45 x 10-6 mol of argon-40. How old was the rock? (Hint: What assumption is made about the origin of the argon-40) 2 A tree killed by being buried under volcanic ash was found to have a ratio of carbon-14 atoms to carbon-12 atoms of 4.8 x 10-14. How long ago did the eruption occur? 3 A wooden door lintel from an excavated site in Mexico would be expected to have what ratio of carbon-14 to carbon-12 atoms if the lintel were 9.0 × 103 years old? Ifa rock sample was found to contain 1.16 × 10-7 mol ofExplanation / Answer
The half life of C-14 isotope is 5730 years. It is the standard data that we have to take for carbon dating.
In the above answer they are taken 3.3*10-13 which were not mentioned in the question. The actual procedure is take reciprocal of given value to substitue in the given formula.
Since -
k = (1/t) ln C14/C12
(0.693/5730) = (1/t) ln 1/(4.8*10-14)
t = 2.55*105 years
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