Chemistry, 27.07.2019 03:20 michaela134
Carbon-14 undergoes a beta (b) decay with a half-life of 5730 years. a sample of carbon dioxide isolated from the atmosphere was observed to have 13.6 disintegrations per minute. however, a sample of atmospheric methane (containing the same number of carbon atoms) was observed to have 11.1 disintegrations per minute (assume that all of the carbon in the carbon dioxide sample is "fresh" carbon. "fresh'" meaning that the amount of 14c atoms in the sample has not fallen from the steady-state value for all living things in the environment) why is there a lower rate of beta decay in the methane sample? a. b. a similar sample of methane was isolated from a section of permafrost in the canadian tundra and found to have 3.1 disintegrations per minute. how long ago did that section freeze? 0.693 hint: recall that half-life, l/- -and k is the rate constant for the decay. 1/ 2 also remember that the general form of exponential decay is n- n, exp-kt) where n is the amount of "c at any given time (t) no is the original amount of 4c
Answers: 1
Chemistry, 22.06.2019 00:00
1) this is the structure in the cell nucleus that houses a cell's genetic information
Answers: 3
Chemistry, 22.06.2019 10:40
Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3
Answers: 1
Chemistry, 22.06.2019 12:30
Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.
Answers: 2
Chemistry, 22.06.2019 12:30
Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?
Answers: 3
Carbon-14 undergoes a beta (b) decay with a half-life of 5730 years. a sample of carbon dioxide isol...
Mathematics, 18.11.2020 01:00
Mathematics, 18.11.2020 01:00
Mathematics, 18.11.2020 01:00
Biology, 18.11.2020 01:00
Mathematics, 18.11.2020 01:00
Chemistry, 18.11.2020 01:00
Social Studies, 18.11.2020 01:00
Arts, 18.11.2020 01:00
Mathematics, 18.11.2020 01:00
Mathematics, 18.11.2020 01:00
Arts, 18.11.2020 01:00