Chemistry, 12.12.2019 00:31 kristintaylorm
Arock contains 0.623 mg of 206pb for every 1.000 mg of 238u present. assuming that no lead was originally present, that all the 206pb formed over the years has remained in the rock, and that the number of nuclides in intermediate stages of decay between 238u and 206pb is negligible, calculate the age of the rock.
Answers: 1
Chemistry, 21.06.2019 19:00
Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?
Answers: 2
Chemistry, 22.06.2019 05:00
Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change
Answers: 3
Arock contains 0.623 mg of 206pb for every 1.000 mg of 238u present. assuming that no lead was origi...
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