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Which type of fossil does this image depict?
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Achemist who studies water samples did a demonstration of how to test for lead in water. she added a clear solution of potassium iodide to a clear solution of lead nitrate. then a yellow swirling solid formed in the liquid. what is most likely true about the yellow solid?
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How many nanometers are in 4.5x10^3 cm?...
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