Given that the half-life of 238U is 4.51 × 109 years, determine the age of rock...

Given that the half-life of 238U is 4.51 × 109 years, determine the age of rock found to contain 1.26 g of 238U and 0.08 g of 206Pb. Enter your answer in scientific notation..(Be sure to report your answer to the correct number of significant figures)

Expert Solution

queen_honey_blossom answered 2 years ago

The common isotope of uranium, 238U, has a half-life of 4.47×109 years, decaying to 234Th by...

The common isotope of uranium, 238U, has a half-life of 4.47×109 years, decaying to 234Th by alpha emission. Part A: What is the decay constant? Express your answer in inverse seconds to three significant figures Part B: What mass of uranium is required for an activity of 2.00 curie? Express your answer in kilograms to three significant figures. Part C: How many alpha particles are emitted per second by 11.0 g of uranium? Express your answer in decays per second...

The half-life for the radioactive decay of U−238U−238 is 4.5 billion years and is independent of...

The half-life for the radioactive decay of U−238U−238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 20% of the U−238 atoms in a sample of U−238 to decay? Express your answer using two significant figures. Part B If a sample of U−238 initially contained 1.1×1018 atoms when the universe was formed 13.8 billion years ago, how many U−238 atoms will it contain today? Express your answer using two significant figures.

Radium-226 is a decay product of 238U . 226Ra has a half-life of 1600 years and is found in uranium ores

Radium-226 is a decay product of 238U . 226Ra has a half-life of 1600 years and is found in uranium ores. When it was first discovered and before radioactive decay was well understood, some mineral prospectors claimed to have discovered a rich deposit of radium (a few percent by mass) in a cave in the American midwest. What do you think of this claim?

A certain element has a half life of 2.52.5 billion years. a. You find a rock...

A certain element has a half life of 2.52.5 billion years. a. You find a rock containing a mixture of the element and lead. You determine that 55?% of the original element? remains; the other 9595?% decayed into lead. How old is the?rock? b. Analysis of another rock shows that it contains 6060?% of its original? element; the other 4040?% decayed into lead. How old is the? rock?

Radium-226 has a half-life of 1,600 years. How many disintegrations would be measured given in a...

Radium-226 has a half-life of 1,600 years. How many disintegrations would be measured given in a 1.5 mg sample of Radium-226 per day?

The half life of 14C is 5730 years. What fraction of the 14C nuclei in a...

The half life of 14C is 5730 years. What fraction of the 14C nuclei in a sample are left after 8140 years?

The age distribution of students at a community college is given below. Age (years) Number of...

The age distribution of students at a community college is given below. Age (years) Number of Students (f) Under 21 416 21-25 420 26-30 219 31-35 51 Over 35 24 Total = 1130 Number of students (f) 416 420 219 51 24 1130 A student from the community college is selected at random. Find the conditional probability that the student is at most 35 given that he or she is at least 26.

Cobalt- 60 is radioactive and has a half life of 5.26 years. Calculate the activity of...

Cobalt- 60 is radioactive and has a half life of 5.26 years. Calculate the activity of a 8.3mg sample of cobalt- 60 . Give your answer in becquerels and in curies. Be sure your answer has the correct number of significant digits.

The half-life of a certain radioactive isotope is 3.24 years. If a sample consisting of 6.023x1023...

The half-life of a certain radioactive isotope is 3.24 years. If a sample consisting of 6.023x1023 atoms were allowed to decay, what percentage of the original number of atoms have decayed after 2.0 years? A) 50 B) 46 C) 32 D) 54 E) 60

The half-life of is 0.1452 years. The surface of the Earth gets frequently bombarded by this isotope...

The half-life of is 0.1452 years. The surface of the Earth gets frequently bombarded by this isotope which is generated in the atmosphere. In an oleander twig, is observed to decay at a 350 decays/s decay rate. (a) How long will it take until the decay rate drops to 25 decays/s? (b) What is the initial mass of present on the oleander twig? Molar mass of is 7.017 g/mol.

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