The average banana contains 0.40 g of potassium and 0.012% of naturally occurring potassium is 40K,...
The average banana contains 0.44 g of potassium and 0.012% of naturally occurring potassium is 40K, which has a half-life of 1.248 x 10° years and an atomic mass of 39.964 u. What is the activity of a freshly picked bunch containing six bananas? activity: Вg
The average banana contains 0.436 g of potassium, and 0.012% of naturally occurring potassium is 40K, which has a half-life of 1.248 × 10^9 years and an atomic mass of 39.964 u. What is the activity of a freshly picked bunch containing three bananas? The activity is the number of 40K decays that occur per unit time. Activity is commonly measured in units of Becquerel (Bq), which is defined as decays per second. Recall that the atomic mass unit u...
The average banana contains 0.41 g of potassium and 0.012% of naturally occurring potassium is 40K, which has a half-life of 1.248 x 10 years and an atomic mass of 39.964 u. What is the activity of a freshly picked pair of bananas? activity: Вq
If naturally occurring 40K is responsible for a dose equivalent of 0.16 mSv/y of background radiation, calculate the mass of 40K that must be inside the 59 kg body of a woman to produce this dose. Assume that each 40K decay emits a 1.30 MeV β, and that 40% of this energy is absorbed inside the body. The half life of 40K is 1.25 × 109 years.
Natural potassium contains 40K, which has a half-life of 1.277×109 y. What mass of 40K in a person would have a decay rate of 4140 Bq? What is the fraction of 40K in natural potassium, given that the person has 140 g in his body? (These numbers are typical for a 70-kg adult.)
UITGUIC Potassium has three naturally occurring isotopes. They are "K (93.26%, ? amu), "K (0.0117%, 39.964 amu), and 4K (6.73%, 40.962 amu) Calculate the atomic mass of the potassium-39 isotope given that the weighted average of the isotopes is 39.099 amu and using the percent abundances of all the isotopes and the atomic masses of potassium- 40 and potassium-41. Express the mass to three decimal places and include the appropriate units. Submit Request Answer
Radioactivity in the body. Potassium is an essential element that normally comprises about 0.30% of a person's body mass. 0.012% of potassium is the radioactive 40K, with half-life 1.28×109 years. What's the potassium activity in a 60 kg person?
will rate. thanks 1.248 X 109 EXAM 13. A 75.0kg man typically contains about 300g of potassium in his body. Given that potassium-40 makes up 0.012% of any sample of potassium and the half-life of potassium-40 is 1.248 x 109 years, how many radioactive decays per year come from his body due to potassium-40? Laboratory 15 | Radioactivity of Potassium - 40 183
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...