Be sure to answer all parts. Determine the age of rock that contains 23.2 mg of...
Not the answer above Be sure to answer all parts 206 Determine the age of rock that contains 41.7 mg of23*U and 3.93 mg of20'Pb. of 238U 4.51 x 109 yr) (1/2 Enter your answer in scientific notation. 9 x 10 15.3 yr
Determind the age of a rock that contains 31.3mg of 238U and 2.77mg of 206Pb. (t1/2 of 238U=4.51 x 109 yr) Enter answer in scientific notation.
Enter your answer in the provided box. A rock sample originally contains 4.10 mg of 238 U. How much 206 Pb will be in the rock sample when it is 3.2 × 10^ 8 years old? The half-life of uranium \−238 is 4.51 × 10^ 9 years.
Enter your answer in the provided box. A rock sample originally contains 3.87 mg of 238U. How much 206 Pb will be in the rock sample when it is 2.5 x 108 years old? The half-life of uranium-238 is 4.51 x 10º years. mg
Determine the age of a rock containing 0.065 g of uranium-238 (112 = 4.5 x 10° yr) and 0.046 g of lead–206. (Assume all the lead-206 came from 238U decay.) Enter your answer in scientific notation. x 10 years old
Determine the age of a rock containing 0.065 g of uranium-238 (t12 = 4.5 x 10°yr) and 0.043 g of lead-206. (Assume all the lead-206 came from 238U decay.) Enter your answer in scientific notation. 2 68 x 10 irs old h
Be sure to answer all parts. A volcanic eruption melts a large area of rock, and all gases are expelled. After cooling, 40Ar (atomic number 18) accumulates from the ongoing decay of 40K (atomic number 19) in the rock (t1/2 = 1.25 × 109 yr). When a piece of rock is analyzed, it is found to contain 1.23 mmol of 40K and 1.15 mmol of 40Ar. How long ago did the rock cool? Enter your answer in scientific notation.
Question 4 U-238 decays to Pb-206 with t12-4.5 x 10°yr. A rock contains 6.75 ng of U-238 and 1.50 ng of Pb-206. How old (yr) is the rock? O 1.4 x 10yr 2.8 x 10°yr 15x10°y 5.2 x 10yr 98x 10°
10. A rock contains 270 micromoles of U-238 and 110 Micromoles of Pb-206. Assuming that all the Pb-206 comes from decay of the U-238, estimate the rock's age.
Be sure to answer all parts. Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 1"C present in the object. The amount of isotope decreases in a first-order process. If 12.0% of the original amount of 1"C is present in a wooden tool at the time of analysis, what is the age of the tool? The half-life of 14C is 5,730 yr. Give your answer in scientific notation. x...