Constants and Conversion Factors 1 Ci = 3.7 x 10¹0Bq Number of atoms per mole = Avogadro's number, A, = 6.023 x 10²3 mol

[answerhappygod]

Constants And Conversion Factors 1 Ci 3 7 X 10 0bq Number Of Atoms Per Mole Avogadro S Number A 6 023 X 10 3 Mol 1 (64.01 KiB) Viewed 11 times

Constants and Conversion Factors 1 Ci = 3.7 x 10¹0Bq Number of atoms per mole = Avogadro's number, A, = 6.023 x 10²3 mol-¹ Number of grams of Cs per mol. = 137g mol-¹ 1) If a sample has 3 x 105 decays in 5 seconds, what is the activity in Ci? Ci Submit 2) How many atoms of 131 I are in a sample with activity of 2 mCi given that the half-life of 1311 is 8.023 days? atoms Submit 3) 137 Cs, is a radioisotope that is often used for the calibration of radiation detectors, such as those used in PET scanners. If you have 2 x 1012 atoms of 137 Cs, what will the activity be after 50 years assuming that the half-life of 137 Cs is 30.07 years? Bq Submit 4) In a real world situation, we would measure the quantity of a substance in grams rather than atoms. What if, instead of 2 x 1012 atoms, you started with 0.5 gram of 137 Cs? Bq Submit Help +