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.
The half-life of Potassium-40 (K-40) decaying to Argon-40 (Ar-40) is 1.3 billion years. Suppose an igneous...
The half life for the radioactive decay of potassium-40 to argon-40 is 1.26 × 109 years. Suppose nuclear chemical analysis shows that there is 0.444 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to 2 significant digits 1.5×10 years
11. Potassium-40 decays to argon-40 with a half-life of 1.27x10 y. What is the age of a rock in which the mass ratio of 4°Ar to oK is 4.2? [15 pt)
ReviewI Constants The technique known as potassium-argon dating is used to date volcanic rock and ash, and thus establish dates for nearby fossils like this hominid skull.(Figure 1) The potassium isotope "0K has a 1.28-billion-year half-life and is naturally present at very low levels. Its most common decay mode is beta-minus decay into the stable isotope 40 Ca, but 10.9% of its decays are beta-plus which result in the creation of the stable isotope 40 Ar. The high temperatures in...
Question 34 3 pts A potassium feldspar mineral KAISI30g is found to contain 8.35ppm 40-K and 0.932 ppm 40-Ar. Use the equation below to determine the age of the mineral and match to the nearest value. t= ti 2 In In(2) Arf Kf + 0.109 Kf where t is the age of mineral and t1/2 for 40-K= 1.248 billion years Kfis final amount 40-K in sample Arfis final amount of 40-Ar in sample 1.3 billion years 810 million years 580...
Question 9 What material is usually dated when scientists use the Potassium-Argon (K/Ar) dating method to date fossils? a. Bones b. Stone tools c. Ostrich shells d. Teeth e. Volcanic rocks Question 10 __________ is a radiometric dating method popular with archaeologists that can be used to date materials up to 75,000 years old. a. Carbon-14 b. Paleomagnetism c. Dendrochronology d. K/Ar e. Biostratigraphy Question 11 Potassium-40 (40K) a. decays to the gas, argon-40 (40Ar). b. decays to carbon-14. c....