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This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.
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Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?
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Based on its chemical properties, identify the position of each chemical family on the periodic table.
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An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.
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Cuuce e consumption of fossil fuels .
d) On burning 3 kg of fuel X, 1,35,000 kJ of energy is produc...
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