Chemistry, 06.05.2020 02:05 SmoothCruzito16
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 1.07 mmol of 40K and 1.45 mmol of 40Ar. How long ago did the rock cool? Enter your answer in scientific notation.
Answers: 2
Chemistry, 21.06.2019 18:40
Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.
Answers: 2
Chemistry, 22.06.2019 07:10
Which of these conditions most likely produces an unstable isotope?
Answers: 2
A volcanic eruption melts a large area of rock, and all gases are expelled. After cooling, 40Ar (ato...
English, 13.11.2020 04:40
Spanish, 13.11.2020 04:40
Geography, 13.11.2020 04:40
History, 13.11.2020 04:40
History, 13.11.2020 04:40
History, 13.11.2020 04:40