Calculate the life of an isotope if 126.7 m disintegrates to 35.2 mg in 3.55 h
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Calculate the life of an isotope if 126.7 m disintegrates to 35.2 mg in 3.55 h
If 43.2 mg of a certain radioactive isotope disintegrates to 10.8 mg in 59.6 seconds, what is the half-life of the isotope? a) 19.9 seconds b) 25.0 seconds c) 14.9 seconds d) 29.8 seconds e) 59.6 seconds Please show work!
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain? 14. Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0g to decay to 7.500 15. Element-106 has a half-life of 0.90 seconds. If one million atoms of it were prepared, how many atoms would remain after 4.5 seconds? 16. A 2.5 gram sample of an...
A patient is given 0.055 mg of technetium-99 m, a radioactive isotope with a half-life of about 6.0 hours. Part A How long does it take for the radioactive isotope to decay to 2.3×10−3 mg ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures
1. A patient is given 0.050 mg of technetium-99 m, a radioactive isotope with a half-life of about 6.0 hours. How long does it take for the radioactive isotope to decay to 4.2×10−3 mg ? (Assume no excretion of the nuclide from the body.) Express your answer using two significant figures.
The isotope given below has a half-life of 1.01 yr. What mass (in mg) of a 2.00−mg sample will remain after 3.75 × 103 h? 212 Bi 83
A particular radioactive isotope decays from 190 milligrams (mg) to 152 mg in 15 days. Find the half life of the isotope. Hint: Find the rate first. The half life of the isotope is the half value of 190 mg then solve for x. Your answer is days.
231 A 60 mg sample of a radioactive isotope decays to 50 mg after 4.7 days. a) Determine the half-life. b) How long will it take for the amount of the isotope to decrease to 20 mg?
also what is the delta H neutralization?
A student mixes 35.2 mL of a 3.11 M sodium hydroxide solution with 35.2 mL of 2.95 M hydrochloric acid. The temperature of the mixture rises 20.8°C. The density of the resulting solution is 1.00 and mL J has a specific heat capacity of 4.184 The heat capacity of the calorimeter is 3.86 g. °C Part 1: (a) Identify the limiting reagent for the reaction. HCI Part 2 out of 3 (b) Calculate...
A 100-mg sample of a radioactive isotope is obtained. After 33.5 minutes, only 3.10 mg remains. What is the half-life of the isotope? min
Strontium-90 has a half-life of 28.1 years. Starting with 3.2 mg of this isotope, how much would remain after 112.4 years?