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  2. College Level Examination Program - Wikipedia

    en.wikipedia.org/wiki/College_Level_Examination...

    The tests are free to U.S. military service members and some veterans. [7] [8] There is an additional fee of $10 for the optional essay portion of some of the exams. Each test usually corresponds to a one or two semester introductory course on the topic, though the Spanish, French, and German Language exams can be used to earn up to 12 credits.

  3. Chemistry Education Research and Practice - Wikipedia

    en.wikipedia.org/wiki/Chemistry_Education...

    Chemistry Education Research and Practice is a quarterly peer-reviewed open access academic journal published by the Royal Society of Chemistry covering chemistry education. The editor-in-chief is Gwen Lawrie of the University of Queensland .

  4. AP Chemistry - Wikipedia

    en.wikipedia.org/wiki/AP_Chemistry

    The 2014 AP Chemistry exam was the first administration of a redesigned test as a result of a redesigning of the AP Chemistry course. The exam format is now different from the previous years, with 60 multiple choice questions (now with only four answer choices per question), 3 long free response questions, and 4 short free response questions.

  5. Electron capture - Wikipedia

    en.wikipedia.org/wiki/Electron_capture

    For example, in 7 Be, a difference of 0.9% has been observed between half-lives in metallic and insulating environments. [9] This relatively large effect is because beryllium is a small atom that employs valence electrons that are close to the nucleus, and also in orbitals with no orbital angular momentum.

  6. GRE Chemistry Test - Wikipedia

    en.wikipedia.org/wiki/GRE_Chemistry_Test

    The GRE subject test in chemistry is a standardized test in the United States created by the Educational Testing Service, and is designed to assess a candidate's potential for graduate or post-graduate study in the field of chemistry. It contains questions from many fields of chemistry. 15% of the questions will come from analytical chemistry ...

  7. Ash (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Ash_(chemistry)

    A crucible and tongs, on a green mat. The ash content of a sample is a measure of the amount of inorganic noncombustible material it contains. The residues after a sample is completely burnt - in contrast to the ash remaining after incomplete combustion - typically consist of oxides of the inorganic elements present in the original sample.

  8. Kruskal–Wallis test - Wikipedia

    en.wikipedia.org/wiki/Kruskal–Wallis_test

    The Kruskal-Wallis test can be implemented in many programming tools and languages. We list here only the open source free software packages: In Python's SciPy package, the function scipy.stats.kruskal can return the test result and p-value. [18] R base-package has an implement of this test using kruskal.test. [19]

  9. Blank (solution) - Wikipedia

    en.wikipedia.org/wiki/Blank_(solution)

    A blank solution is a solution containing little to no analyte of interest, [1] usually used to calibrate instruments such as a colorimeter.According to the EPA, the "primary purpose of blanks is to trace sources of artificially introduced contamination."

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