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Test tubes are used mostly for a. storing experimental samples b. making precise measurements of liquids c. containing extra chemicals left over from an experiment d. holding substances so they can be viewed using a microscope
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Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife
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Chemistry, 22.06.2019 08:00
Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.
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Chemistry, 22.06.2019 12:00
What is the subscript for oxygen in its molecular formula
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