A 3.255 g sample of technetium-95 is sealed in a container. After 44.2 hours, the amount of technetium-95 remaining is 0.702 g. (a) Calculate the rate constant k for 95Tc. (b) Calculate the half-life t1/2 for 95Tc.
A 3.255 g sample of technetium-95 is sealed in a container. After 44.2 hours, the amount...
A 3.046 g sample of Tc-95 is sealed in a container. After 44.2 hours, the amount of Tc-95 remaining is 0.657g. (a) Determine the rate constant k for 95-Tc. __________________________1/h (b) Calculate the half-life t1/2 for 95-Tc. ________________________________hrs
Part A: A sample of a gas is in a sealed container. The pressure of the gas is 705 torr , and the temperature is 37 ∘C . If the temperature changes to 88 ∘C with no change in volume or amount of gas, what is the new pressure, P2, of the gas inside the container? Part B: Using the same sample of gas (P1 = 705 torr , T1 = 37 ∘C ), we wish to change the pressure...
If a 500. mg sample of technetium-99m is used for a diagnostic procedure, how much Tc-99m remains after each interval: (a) 12.0 h; (b) 24.0 h? (The half life of technetium-99m is 6.0 hours.) NINETE ch 5 attempts left Check my work SICH Be sure to answer all parts. If a 500. mg sample of technetium-99m is used for a diagnostic procedure, how much Tc-99m remains after each interval: (a) 12.0 h; (b) 24.0 h? (The half-life of technetium-99m is...
How long (in hours) will it take for 99% ofthe technetium 99-m to have decayed after an initial dose. (Half life is 6 hours). 20) a. 48.0 hours b. 40.0 hours c. 20.0 hours d. 1.11 hours e. 0.087 hours
PART A A sample of ideal gas is in a sealed container. The pressure of the gas is 445 torr , and the temperature is 26 ∘C . If the temperature changes to 98 ∘C with no change in volume or amount of gas, what is the new pressure, P2, of the gas inside the container? Express your answer with the appropriate units. PART B Using the same sample of gas (P1 = 445 torr , T1 = 26 ∘C...
please help me with answers thanks Experiment 14 - Nuclear Chemistry iven 0.050 mg of technetium-99m, a radioactive isotope with a half. 5. A patient is given 0.050 mg of technetium-99m, a radioactive life of about 6.0 hours. How much technetium will remain after 24 hours hours? after 24 hours? After 48 6. A patient receives a 58-mg dose of 1-131 to obtain an image of her thyroid. If the nuclide has a half-life of 8 days, how long will...
please explain 6. Suppose 1-g sample of pure 226Ra is placed in a sealed container. Com- pute the quantity of helium present in the container after four weeks.
When a sample of HBr (g) was placed inside a sealed container at 600 K, with a pressure of 1.93x10^6 Pa, the density of the gas was experimentally found to be 40 g/L. What is the compression factor Z for this gas under these conditions? What sort of intermolecular forces are dominating at these conditions: attractive or repulsive?
A sample of CaCO3(s) is introduced into a sealed container of volume 0.668 L and heated to 1000 K until equilibrium is reached. The Kp for the reaction CaCO3(s)⇌CaO(s)+CO2(g) is 3.7×10−2 at this temperature. 1. Calculate the mass of CaO(s) that is present at equilibrium.
The half-life for the process 238U→206Pb is 4.5×109yr. A mineral sample contains 61.0 mg of 238U and 14.5 mg of 206Pb. What is the age of the mineral? To calculate the age of the mineral, begin by rearranging the first-order relationship between the half-life, t1/2, and the decay constant to solve for the decay constant, k. k=0.693/t1/2 Then, use the following formula to solve for the age of the mineral, t: t=−1klnNtN0 where N0 is the original amount of 238U...