The average banana contains 0.41 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 0.40 g of potassium and 0.012% of naturally occurring potassium is 40K, which has a half-life of 1.248 x 109 years and an atomic mass of 39.964 u. What is the activity of a freshly picked bunch containing three bananas? activity: Вq
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...
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
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.)
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.
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
I am confused and need to see steps to understand (a) Natural potassium contains Ok, which has a half-life of 1.277 x 10 y. What mass (ing) of "' in a person would have a decay rate of 4120 Bq? (b) What is the fraction of in natural potassium, given the person has 139 g in his body?
15) The molecular weight of a gas that has a density of 7.10 g/, at 250 C and 1.00 atm pressure is15) gmol. A) 14.6 B) 5.75 10-3 C) 6.85 10-2 D) 174 E) 28.0 16) 16) Which of the following substance is being reduced in the following reaction.? Cu (s) 2AgNO3 (a) 2Ag (s) Cu(NO312 (aq) D) Cu A) Ag B) AgNO3 i 17) 17) The element X has two naturally occurring isotopes. The masses (amu) and % abundances...
please complete the questions has not answering with clarification of the answer to any page Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...