Chemistry, 18.01.2020 04:31, nkazmirski5598
The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 ã 109 yr. a sample of moon rock was found to contain 78 argon-40 atoms for every 22 potassium-40 atoms. the age of the rock is:
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Chemistry, 22.06.2019 02:00, natalie857123
For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition
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Chemistry, 22.06.2019 05:00, happy121906
Which position represents spring in the southern hemisphere? a) b) c) d)
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The radioisotope potassium-40 decays to argon-40 by positron emission with a half-life of 1.3 ã 109...
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