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Help m pleaseee create a biography of an element
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In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification
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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?
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In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?
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