If a substance has a half-life of 55.6 s, and if 230.0 g of the substance are present initially, how many grams will remain after 10.0 minutes?
If a substance has a half-life of 55.6 s, and if 230.0 g of the substance are present initially, how many grams will rem...
If a substance has a half-life of 3.70 days, and there are initially 50.0 g of the substance, how many grams will remain after precisely three weeks? Report your answer with three significant figures.
Cesium- 137, a beta emitter, has a half-life of 30y. - How many grams of a 16g sample of Cesium- 137 would remain after 90y. - How many years will be needed for a 28g of Cesium- 137 to devay to 3.5 g of Cesium- 137.
Part A how many grams will remain after Phosphorus 32 has a half-life of 14.0 days. Starting with 8.00 g of 840 days? Express your answer numerically in grams. View Available Hints) VALO Submit
if a substance has a half-life of 19.1 years, how many years will it take for 125 g of the substance to be depleted to 5.0
Barium – 122 has a half-life of 2 minutes. Suppose you obtain a sample weighing 10.0 g and it takes 10 minutes to set up an experiment. How many grams of Barium – 122 will remain at the point when you begin the experiment?
A radioactive substance decays at a rate proportional to the amount present at ime t (in hours). Initially, Ao grams of the substance was present, and after 10 hours, the mount has decreased by 20% How long will it take the substance to decay to 40? hat is the half life of this substance? Hint: the half-life is the time required for half of the initial substance to decay)
An unknown radioactive substance has a half-life of 3.20 hours. If 39.6 g of the substance is currently present, what mass Ao was present 8.00 hours ago? Express your answer with the appropriate units. View Available Hint(s) ? OP HÅR A9 = Value O 2 Units Submit Part C Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 34.0 % of an Am-241...
Phosphorus-32 has a half-life of 14.3 days. How many grams remain from a 10 gram sample after 13 days? Click here for a copy of Final Exam cover sheet.
The half-life of the radioactive element unobtanium-43 is 10 seconds. If 176 grams of unobtanium-43 are initially present, how many grams are present after 10 seconds? 20 seconds ? 30 seconds? 40 seconds? 50 seconds? The amount left after 10 seconds is grams The half-life of the radioactive element unobtanium-43 is 10 seconds. If 176 grams of unobtanium-43 are initially present, how many grams are present after 10 seconds? 20 seconds? 30 seconds? 40 seconds? 50 seconds? The amount left...
A radioactive substance has a decay rate of 0.064 per minute. How many grams of a 150 gram sample will remain radioactive after 45 minutes? Round the answer to the nearest tenth of a gram, and do not include the unit in your answer. Sorry, that's incorrect. Try again? 147.1