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How many atoms of nitrogen are in the chemical formula ni(w on
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Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3
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The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?
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What is the definition of miasma...
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